Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */ |
| 2 | /* |
| 3 | Written/copyright 1999-2001 by Donald Becker. |
| 4 | Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com) |
| 5 | Portions copyright 2001,2002 Manfred Spraul (manfred@colorfullife.com) |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 6 | Portions copyright 2004 Harald Welte <laforge@gnumonks.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | This software may be used and distributed according to the terms of |
| 9 | the GNU General Public License (GPL), incorporated herein by reference. |
| 10 | Drivers based on or derived from this code fall under the GPL and must |
| 11 | retain the authorship, copyright and license notice. This file is not |
| 12 | a complete program and may only be used when the entire operating |
| 13 | system is licensed under the GPL. License for under other terms may be |
| 14 | available. Contact the original author for details. |
| 15 | |
| 16 | The original author may be reached as becker@scyld.com, or at |
| 17 | Scyld Computing Corporation |
| 18 | 410 Severn Ave., Suite 210 |
| 19 | Annapolis MD 21403 |
| 20 | |
| 21 | Support information and updates available at |
| 22 | http://www.scyld.com/network/netsemi.html |
Jeff Garzik | 03a8c66 | 2006-06-27 07:57:22 -0400 | [diff] [blame] | 23 | [link no longer provides useful info -jgarzik] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | TODO: |
| 27 | * big endian support with CFG:BEM instead of cpu_to_le32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/errno.h> |
| 35 | #include <linux/ioport.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/netdevice.h> |
| 40 | #include <linux/etherdevice.h> |
| 41 | #include <linux/skbuff.h> |
| 42 | #include <linux/init.h> |
| 43 | #include <linux/spinlock.h> |
| 44 | #include <linux/ethtool.h> |
| 45 | #include <linux/delay.h> |
| 46 | #include <linux/rtnetlink.h> |
| 47 | #include <linux/mii.h> |
| 48 | #include <linux/crc32.h> |
| 49 | #include <linux/bitops.h> |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 50 | #include <linux/prefetch.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <asm/processor.h> /* Processor type for cache alignment. */ |
| 52 | #include <asm/io.h> |
| 53 | #include <asm/irq.h> |
| 54 | #include <asm/uaccess.h> |
| 55 | |
| 56 | #define DRV_NAME "natsemi" |
Andy Gospodarek | d5b2069 | 2006-09-11 17:39:18 -0400 | [diff] [blame] | 57 | #define DRV_VERSION "2.1" |
| 58 | #define DRV_RELDATE "Sept 11, 2006" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | #define RX_OFFSET 2 |
| 61 | |
| 62 | /* Updated to recommendations in pci-skeleton v2.03. */ |
| 63 | |
| 64 | /* The user-configurable values. |
| 65 | These may be modified when a driver module is loaded.*/ |
| 66 | |
| 67 | #define NATSEMI_DEF_MSG (NETIF_MSG_DRV | \ |
| 68 | NETIF_MSG_LINK | \ |
| 69 | NETIF_MSG_WOL | \ |
| 70 | NETIF_MSG_RX_ERR | \ |
| 71 | NETIF_MSG_TX_ERR) |
| 72 | static int debug = -1; |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static int mtu; |
| 75 | |
| 76 | /* Maximum number of multicast addresses to filter (vs. rx-all-multicast). |
| 77 | This chip uses a 512 element hash table based on the Ethernet CRC. */ |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 78 | static const int multicast_filter_limit = 100; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /* Set the copy breakpoint for the copy-only-tiny-frames scheme. |
| 81 | Setting to > 1518 effectively disables this feature. */ |
| 82 | static int rx_copybreak; |
| 83 | |
| 84 | /* Used to pass the media type, etc. |
| 85 | Both 'options[]' and 'full_duplex[]' should exist for driver |
| 86 | interoperability. |
| 87 | The media type is usually passed in 'options[]'. |
| 88 | */ |
| 89 | #define MAX_UNITS 8 /* More are supported, limit only on options */ |
| 90 | static int options[MAX_UNITS]; |
| 91 | static int full_duplex[MAX_UNITS]; |
| 92 | |
| 93 | /* Operational parameters that are set at compile time. */ |
| 94 | |
| 95 | /* Keep the ring sizes a power of two for compile efficiency. |
| 96 | The compiler will convert <unsigned>'%'<2^N> into a bit mask. |
| 97 | Making the Tx ring too large decreases the effectiveness of channel |
| 98 | bonding and packet priority. |
| 99 | There are no ill effects from too-large receive rings. */ |
| 100 | #define TX_RING_SIZE 16 |
| 101 | #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */ |
| 102 | #define RX_RING_SIZE 32 |
| 103 | |
| 104 | /* Operational parameters that usually are not changed. */ |
| 105 | /* Time in jiffies before concluding the transmitter is hung. */ |
| 106 | #define TX_TIMEOUT (2*HZ) |
| 107 | |
| 108 | #define NATSEMI_HW_TIMEOUT 400 |
| 109 | #define NATSEMI_TIMER_FREQ 3*HZ |
| 110 | #define NATSEMI_PG0_NREGS 64 |
| 111 | #define NATSEMI_RFDR_NREGS 8 |
| 112 | #define NATSEMI_PG1_NREGS 4 |
| 113 | #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS + \ |
| 114 | NATSEMI_PG1_NREGS) |
| 115 | #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */ |
| 116 | #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
| 118 | /* Buffer sizes: |
| 119 | * The nic writes 32-bit values, even if the upper bytes of |
| 120 | * a 32-bit value are beyond the end of the buffer. |
| 121 | */ |
| 122 | #define NATSEMI_HEADERS 22 /* 2*mac,type,vlan,crc */ |
| 123 | #define NATSEMI_PADDING 16 /* 2 bytes should be sufficient */ |
| 124 | #define NATSEMI_LONGPKT 1518 /* limit for normal packets */ |
| 125 | #define NATSEMI_RX_LIMIT 2046 /* maximum supported by hardware */ |
| 126 | |
| 127 | /* These identify the driver base version and may not be removed. */ |
Randy Dunlap | e19360f | 2006-04-10 23:22:06 -0700 | [diff] [blame] | 128 | static const char version[] __devinitdata = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | KERN_INFO DRV_NAME " dp8381x driver, version " |
| 130 | DRV_VERSION ", " DRV_RELDATE "\n" |
| 131 | KERN_INFO " originally by Donald Becker <becker@scyld.com>\n" |
| 132 | KERN_INFO " http://www.scyld.com/network/natsemi.html\n" |
| 133 | KERN_INFO " 2.4.x kernel port by Jeff Garzik, Tjeerd Mulder\n"; |
| 134 | |
| 135 | MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); |
| 136 | MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver"); |
| 137 | MODULE_LICENSE("GPL"); |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | module_param(mtu, int, 0); |
| 140 | module_param(debug, int, 0); |
| 141 | module_param(rx_copybreak, int, 0); |
| 142 | module_param_array(options, int, NULL, 0); |
| 143 | module_param_array(full_duplex, int, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)"); |
| 145 | MODULE_PARM_DESC(debug, "DP8381x default debug level"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 146 | MODULE_PARM_DESC(rx_copybreak, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | "DP8381x copy breakpoint for copy-only-tiny-frames"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 148 | MODULE_PARM_DESC(options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | "DP8381x: Bits 0-3: media type, bit 17: full duplex"); |
| 150 | MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)"); |
| 151 | |
| 152 | /* |
| 153 | Theory of Operation |
| 154 | |
| 155 | I. Board Compatibility |
| 156 | |
| 157 | This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC. |
| 158 | It also works with other chips in in the DP83810 series. |
| 159 | |
| 160 | II. Board-specific settings |
| 161 | |
| 162 | This driver requires the PCI interrupt line to be valid. |
| 163 | It honors the EEPROM-set values. |
| 164 | |
| 165 | III. Driver operation |
| 166 | |
| 167 | IIIa. Ring buffers |
| 168 | |
| 169 | This driver uses two statically allocated fixed-size descriptor lists |
| 170 | formed into rings by a branch from the final descriptor to the beginning of |
| 171 | the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. |
| 172 | The NatSemi design uses a 'next descriptor' pointer that the driver forms |
| 173 | into a list. |
| 174 | |
| 175 | IIIb/c. Transmit/Receive Structure |
| 176 | |
| 177 | This driver uses a zero-copy receive and transmit scheme. |
| 178 | The driver allocates full frame size skbuffs for the Rx ring buffers at |
| 179 | open() time and passes the skb->data field to the chip as receive data |
| 180 | buffers. When an incoming frame is less than RX_COPYBREAK bytes long, |
| 181 | a fresh skbuff is allocated and the frame is copied to the new skbuff. |
| 182 | When the incoming frame is larger, the skbuff is passed directly up the |
| 183 | protocol stack. Buffers consumed this way are replaced by newly allocated |
| 184 | skbuffs in a later phase of receives. |
| 185 | |
| 186 | The RX_COPYBREAK value is chosen to trade-off the memory wasted by |
| 187 | using a full-sized skbuff for small frames vs. the copying costs of larger |
| 188 | frames. New boards are typically used in generously configured machines |
| 189 | and the underfilled buffers have negligible impact compared to the benefit of |
| 190 | a single allocation size, so the default value of zero results in never |
| 191 | copying packets. When copying is done, the cost is usually mitigated by using |
| 192 | a combined copy/checksum routine. Copying also preloads the cache, which is |
| 193 | most useful with small frames. |
| 194 | |
| 195 | A subtle aspect of the operation is that unaligned buffers are not permitted |
| 196 | by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't |
| 197 | longword aligned for further processing. On copies frames are put into the |
| 198 | skbuff at an offset of "+2", 16-byte aligning the IP header. |
| 199 | |
| 200 | IIId. Synchronization |
| 201 | |
| 202 | Most operations are synchronized on the np->lock irq spinlock, except the |
| 203 | performance critical codepaths: |
| 204 | |
| 205 | The rx process only runs in the interrupt handler. Access from outside |
| 206 | the interrupt handler is only permitted after disable_irq(). |
| 207 | |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 208 | The rx process usually runs under the netif_tx_lock. If np->intr_tx_reap |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | is set, then access is permitted under spin_lock_irq(&np->lock). |
| 210 | |
| 211 | Thus configuration functions that want to access everything must call |
| 212 | disable_irq(dev->irq); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 213 | netif_tx_lock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | spin_lock_irq(&np->lock); |
| 215 | |
| 216 | IV. Notes |
| 217 | |
| 218 | NatSemi PCI network controllers are very uncommon. |
| 219 | |
| 220 | IVb. References |
| 221 | |
| 222 | http://www.scyld.com/expert/100mbps.html |
| 223 | http://www.scyld.com/expert/NWay.html |
| 224 | Datasheet is available from: |
| 225 | http://www.national.com/pf/DP/DP83815.html |
| 226 | |
| 227 | IVc. Errata |
| 228 | |
| 229 | None characterised. |
| 230 | */ |
| 231 | |
| 232 | |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | /* |
| 235 | * Support for fibre connections on Am79C874: |
| 236 | * This phy needs a special setup when connected to a fibre cable. |
| 237 | * http://www.amd.com/files/connectivitysolutions/networking/archivednetworking/22235.pdf |
| 238 | */ |
| 239 | #define PHYID_AM79C874 0x0022561b |
| 240 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 241 | enum { |
| 242 | MII_MCTRL = 0x15, /* mode control register */ |
| 243 | MII_FX_SEL = 0x0001, /* 100BASE-FX (fiber) */ |
| 244 | MII_EN_SCRM = 0x0004, /* enable scrambler (tp) */ |
| 245 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Mark Brown | 6aab444 | 2007-02-19 20:15:40 +0000 | [diff] [blame] | 247 | enum { |
| 248 | NATSEMI_FLAG_IGNORE_PHY = 0x1, |
| 249 | }; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | /* array of board data directly indexed by pci_tbl[x].driver_data */ |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 252 | static const struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | const char *name; |
| 254 | unsigned long flags; |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 255 | unsigned int eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } natsemi_pci_info[] __devinitdata = { |
Mark Brown | 6aab444 | 2007-02-19 20:15:40 +0000 | [diff] [blame] | 257 | { "Aculab E1/T1 PMXc cPCI carrier card", NATSEMI_FLAG_IGNORE_PHY, 128 }, |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 258 | { "NatSemi DP8381[56]", 0, 24 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | }; |
| 260 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 261 | static const struct pci_device_id natsemi_pci_tbl[] __devinitdata = { |
Mark Brown | 6aab444 | 2007-02-19 20:15:40 +0000 | [diff] [blame] | 262 | { PCI_VENDOR_ID_NS, 0x0020, 0x12d9, 0x000c, 0, 0, 0 }, |
Mark Brown | 36c843d | 2007-02-25 15:37:27 +0000 | [diff] [blame] | 263 | { PCI_VENDOR_ID_NS, 0x0020, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 264 | { } /* terminate list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | }; |
| 266 | MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl); |
| 267 | |
| 268 | /* Offsets to the device registers. |
| 269 | Unlike software-only systems, device drivers interact with complex hardware. |
| 270 | It's not useful to define symbolic names for every register bit in the |
| 271 | device. |
| 272 | */ |
| 273 | enum register_offsets { |
| 274 | ChipCmd = 0x00, |
| 275 | ChipConfig = 0x04, |
| 276 | EECtrl = 0x08, |
| 277 | PCIBusCfg = 0x0C, |
| 278 | IntrStatus = 0x10, |
| 279 | IntrMask = 0x14, |
| 280 | IntrEnable = 0x18, |
| 281 | IntrHoldoff = 0x1C, /* DP83816 only */ |
| 282 | TxRingPtr = 0x20, |
| 283 | TxConfig = 0x24, |
| 284 | RxRingPtr = 0x30, |
| 285 | RxConfig = 0x34, |
| 286 | ClkRun = 0x3C, |
| 287 | WOLCmd = 0x40, |
| 288 | PauseCmd = 0x44, |
| 289 | RxFilterAddr = 0x48, |
| 290 | RxFilterData = 0x4C, |
| 291 | BootRomAddr = 0x50, |
| 292 | BootRomData = 0x54, |
| 293 | SiliconRev = 0x58, |
| 294 | StatsCtrl = 0x5C, |
| 295 | StatsData = 0x60, |
| 296 | RxPktErrs = 0x60, |
| 297 | RxMissed = 0x68, |
| 298 | RxCRCErrs = 0x64, |
| 299 | BasicControl = 0x80, |
| 300 | BasicStatus = 0x84, |
| 301 | AnegAdv = 0x90, |
| 302 | AnegPeer = 0x94, |
| 303 | PhyStatus = 0xC0, |
| 304 | MIntrCtrl = 0xC4, |
| 305 | MIntrStatus = 0xC8, |
| 306 | PhyCtrl = 0xE4, |
| 307 | |
| 308 | /* These are from the spec, around page 78... on a separate table. |
| 309 | * The meaning of these registers depend on the value of PGSEL. */ |
| 310 | PGSEL = 0xCC, |
| 311 | PMDCSR = 0xE4, |
| 312 | TSTDAT = 0xFC, |
| 313 | DSPCFG = 0xF4, |
| 314 | SDCFG = 0xF8 |
| 315 | }; |
| 316 | /* the values for the 'magic' registers above (PGSEL=1) */ |
| 317 | #define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */ |
| 318 | #define TSTDAT_VAL 0x0 |
| 319 | #define DSPCFG_VAL 0x5040 |
| 320 | #define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */ |
| 321 | #define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */ |
| 322 | #define DSPCFG_COEF 0x1000 /* see coefficient (in TSTDAT) bit in DSPCFG */ |
| 323 | #define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */ |
| 324 | |
| 325 | /* misc PCI space registers */ |
| 326 | enum pci_register_offsets { |
| 327 | PCIPM = 0x44, |
| 328 | }; |
| 329 | |
| 330 | enum ChipCmd_bits { |
| 331 | ChipReset = 0x100, |
| 332 | RxReset = 0x20, |
| 333 | TxReset = 0x10, |
| 334 | RxOff = 0x08, |
| 335 | RxOn = 0x04, |
| 336 | TxOff = 0x02, |
| 337 | TxOn = 0x01, |
| 338 | }; |
| 339 | |
| 340 | enum ChipConfig_bits { |
| 341 | CfgPhyDis = 0x200, |
| 342 | CfgPhyRst = 0x400, |
| 343 | CfgExtPhy = 0x1000, |
| 344 | CfgAnegEnable = 0x2000, |
| 345 | CfgAneg100 = 0x4000, |
| 346 | CfgAnegFull = 0x8000, |
| 347 | CfgAnegDone = 0x8000000, |
| 348 | CfgFullDuplex = 0x20000000, |
| 349 | CfgSpeed100 = 0x40000000, |
| 350 | CfgLink = 0x80000000, |
| 351 | }; |
| 352 | |
| 353 | enum EECtrl_bits { |
| 354 | EE_ShiftClk = 0x04, |
| 355 | EE_DataIn = 0x01, |
| 356 | EE_ChipSelect = 0x08, |
| 357 | EE_DataOut = 0x02, |
| 358 | MII_Data = 0x10, |
| 359 | MII_Write = 0x20, |
| 360 | MII_ShiftClk = 0x40, |
| 361 | }; |
| 362 | |
| 363 | enum PCIBusCfg_bits { |
| 364 | EepromReload = 0x4, |
| 365 | }; |
| 366 | |
| 367 | /* Bits in the interrupt status/mask registers. */ |
| 368 | enum IntrStatus_bits { |
| 369 | IntrRxDone = 0x0001, |
| 370 | IntrRxIntr = 0x0002, |
| 371 | IntrRxErr = 0x0004, |
| 372 | IntrRxEarly = 0x0008, |
| 373 | IntrRxIdle = 0x0010, |
| 374 | IntrRxOverrun = 0x0020, |
| 375 | IntrTxDone = 0x0040, |
| 376 | IntrTxIntr = 0x0080, |
| 377 | IntrTxErr = 0x0100, |
| 378 | IntrTxIdle = 0x0200, |
| 379 | IntrTxUnderrun = 0x0400, |
| 380 | StatsMax = 0x0800, |
| 381 | SWInt = 0x1000, |
| 382 | WOLPkt = 0x2000, |
| 383 | LinkChange = 0x4000, |
| 384 | IntrHighBits = 0x8000, |
| 385 | RxStatusFIFOOver = 0x10000, |
| 386 | IntrPCIErr = 0xf00000, |
| 387 | RxResetDone = 0x1000000, |
| 388 | TxResetDone = 0x2000000, |
| 389 | IntrAbnormalSummary = 0xCD20, |
| 390 | }; |
| 391 | |
| 392 | /* |
| 393 | * Default Interrupts: |
| 394 | * Rx OK, Rx Packet Error, Rx Overrun, |
| 395 | * Tx OK, Tx Packet Error, Tx Underrun, |
| 396 | * MIB Service, Phy Interrupt, High Bits, |
| 397 | * Rx Status FIFO overrun, |
| 398 | * Received Target Abort, Received Master Abort, |
| 399 | * Signalled System Error, Received Parity Error |
| 400 | */ |
| 401 | #define DEFAULT_INTR 0x00f1cd65 |
| 402 | |
| 403 | enum TxConfig_bits { |
| 404 | TxDrthMask = 0x3f, |
| 405 | TxFlthMask = 0x3f00, |
| 406 | TxMxdmaMask = 0x700000, |
| 407 | TxMxdma_512 = 0x0, |
| 408 | TxMxdma_4 = 0x100000, |
| 409 | TxMxdma_8 = 0x200000, |
| 410 | TxMxdma_16 = 0x300000, |
| 411 | TxMxdma_32 = 0x400000, |
| 412 | TxMxdma_64 = 0x500000, |
| 413 | TxMxdma_128 = 0x600000, |
| 414 | TxMxdma_256 = 0x700000, |
| 415 | TxCollRetry = 0x800000, |
| 416 | TxAutoPad = 0x10000000, |
| 417 | TxMacLoop = 0x20000000, |
| 418 | TxHeartIgn = 0x40000000, |
| 419 | TxCarrierIgn = 0x80000000 |
| 420 | }; |
| 421 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 422 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | * Tx Configuration: |
| 424 | * - 256 byte DMA burst length |
| 425 | * - fill threshold 512 bytes (i.e. restart DMA when 512 bytes are free) |
| 426 | * - 64 bytes initial drain threshold (i.e. begin actual transmission |
| 427 | * when 64 byte are in the fifo) |
| 428 | * - on tx underruns, increase drain threshold by 64. |
| 429 | * - at most use a drain threshold of 1472 bytes: The sum of the fill |
| 430 | * threshold and the drain threshold must be less than 2016 bytes. |
| 431 | * |
| 432 | */ |
| 433 | #define TX_FLTH_VAL ((512/32) << 8) |
| 434 | #define TX_DRTH_VAL_START (64/32) |
| 435 | #define TX_DRTH_VAL_INC 2 |
| 436 | #define TX_DRTH_VAL_LIMIT (1472/32) |
| 437 | |
| 438 | enum RxConfig_bits { |
| 439 | RxDrthMask = 0x3e, |
| 440 | RxMxdmaMask = 0x700000, |
| 441 | RxMxdma_512 = 0x0, |
| 442 | RxMxdma_4 = 0x100000, |
| 443 | RxMxdma_8 = 0x200000, |
| 444 | RxMxdma_16 = 0x300000, |
| 445 | RxMxdma_32 = 0x400000, |
| 446 | RxMxdma_64 = 0x500000, |
| 447 | RxMxdma_128 = 0x600000, |
| 448 | RxMxdma_256 = 0x700000, |
| 449 | RxAcceptLong = 0x8000000, |
| 450 | RxAcceptTx = 0x10000000, |
| 451 | RxAcceptRunt = 0x40000000, |
| 452 | RxAcceptErr = 0x80000000 |
| 453 | }; |
| 454 | #define RX_DRTH_VAL (128/8) |
| 455 | |
| 456 | enum ClkRun_bits { |
| 457 | PMEEnable = 0x100, |
| 458 | PMEStatus = 0x8000, |
| 459 | }; |
| 460 | |
| 461 | enum WolCmd_bits { |
| 462 | WakePhy = 0x1, |
| 463 | WakeUnicast = 0x2, |
| 464 | WakeMulticast = 0x4, |
| 465 | WakeBroadcast = 0x8, |
| 466 | WakeArp = 0x10, |
| 467 | WakePMatch0 = 0x20, |
| 468 | WakePMatch1 = 0x40, |
| 469 | WakePMatch2 = 0x80, |
| 470 | WakePMatch3 = 0x100, |
| 471 | WakeMagic = 0x200, |
| 472 | WakeMagicSecure = 0x400, |
| 473 | SecureHack = 0x100000, |
| 474 | WokePhy = 0x400000, |
| 475 | WokeUnicast = 0x800000, |
| 476 | WokeMulticast = 0x1000000, |
| 477 | WokeBroadcast = 0x2000000, |
| 478 | WokeArp = 0x4000000, |
| 479 | WokePMatch0 = 0x8000000, |
| 480 | WokePMatch1 = 0x10000000, |
| 481 | WokePMatch2 = 0x20000000, |
| 482 | WokePMatch3 = 0x40000000, |
| 483 | WokeMagic = 0x80000000, |
| 484 | WakeOptsSummary = 0x7ff |
| 485 | }; |
| 486 | |
| 487 | enum RxFilterAddr_bits { |
| 488 | RFCRAddressMask = 0x3ff, |
| 489 | AcceptMulticast = 0x00200000, |
| 490 | AcceptMyPhys = 0x08000000, |
| 491 | AcceptAllPhys = 0x10000000, |
| 492 | AcceptAllMulticast = 0x20000000, |
| 493 | AcceptBroadcast = 0x40000000, |
| 494 | RxFilterEnable = 0x80000000 |
| 495 | }; |
| 496 | |
| 497 | enum StatsCtrl_bits { |
| 498 | StatsWarn = 0x1, |
| 499 | StatsFreeze = 0x2, |
| 500 | StatsClear = 0x4, |
| 501 | StatsStrobe = 0x8, |
| 502 | }; |
| 503 | |
| 504 | enum MIntrCtrl_bits { |
| 505 | MICRIntEn = 0x2, |
| 506 | }; |
| 507 | |
| 508 | enum PhyCtrl_bits { |
| 509 | PhyAddrMask = 0x1f, |
| 510 | }; |
| 511 | |
| 512 | #define PHY_ADDR_NONE 32 |
| 513 | #define PHY_ADDR_INTERNAL 1 |
| 514 | |
| 515 | /* values we might find in the silicon revision register */ |
| 516 | #define SRR_DP83815_C 0x0302 |
| 517 | #define SRR_DP83815_D 0x0403 |
| 518 | #define SRR_DP83816_A4 0x0504 |
| 519 | #define SRR_DP83816_A5 0x0505 |
| 520 | |
| 521 | /* The Rx and Tx buffer descriptors. */ |
| 522 | /* Note that using only 32 bit fields simplifies conversion to big-endian |
| 523 | architectures. */ |
| 524 | struct netdev_desc { |
| 525 | u32 next_desc; |
| 526 | s32 cmd_status; |
| 527 | u32 addr; |
| 528 | u32 software_use; |
| 529 | }; |
| 530 | |
| 531 | /* Bits in network_desc.status */ |
| 532 | enum desc_status_bits { |
| 533 | DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000, |
| 534 | DescNoCRC=0x10000000, DescPktOK=0x08000000, |
| 535 | DescSizeMask=0xfff, |
| 536 | |
| 537 | DescTxAbort=0x04000000, DescTxFIFO=0x02000000, |
| 538 | DescTxCarrier=0x01000000, DescTxDefer=0x00800000, |
| 539 | DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000, |
| 540 | DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000, |
| 541 | |
| 542 | DescRxAbort=0x04000000, DescRxOver=0x02000000, |
| 543 | DescRxDest=0x01800000, DescRxLong=0x00400000, |
| 544 | DescRxRunt=0x00200000, DescRxInvalid=0x00100000, |
| 545 | DescRxCRC=0x00080000, DescRxAlign=0x00040000, |
| 546 | DescRxLoop=0x00020000, DesRxColl=0x00010000, |
| 547 | }; |
| 548 | |
| 549 | struct netdev_private { |
| 550 | /* Descriptor rings first for alignment */ |
| 551 | dma_addr_t ring_dma; |
| 552 | struct netdev_desc *rx_ring; |
| 553 | struct netdev_desc *tx_ring; |
| 554 | /* The addresses of receive-in-place skbuffs */ |
| 555 | struct sk_buff *rx_skbuff[RX_RING_SIZE]; |
| 556 | dma_addr_t rx_dma[RX_RING_SIZE]; |
| 557 | /* address of a sent-in-place packet/buffer, for later free() */ |
| 558 | struct sk_buff *tx_skbuff[TX_RING_SIZE]; |
| 559 | dma_addr_t tx_dma[TX_RING_SIZE]; |
| 560 | struct net_device_stats stats; |
| 561 | /* Media monitoring timer */ |
| 562 | struct timer_list timer; |
| 563 | /* Frequently used values: keep some adjacent for cache effect */ |
| 564 | struct pci_dev *pci_dev; |
| 565 | struct netdev_desc *rx_head_desc; |
| 566 | /* Producer/consumer ring indices */ |
| 567 | unsigned int cur_rx, dirty_rx; |
| 568 | unsigned int cur_tx, dirty_tx; |
| 569 | /* Based on MTU+slack. */ |
| 570 | unsigned int rx_buf_sz; |
| 571 | int oom; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 572 | /* Interrupt status */ |
| 573 | u32 intr_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | /* Do not touch the nic registers */ |
| 575 | int hands_off; |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 576 | /* Don't pay attention to the reported link state. */ |
| 577 | int ignore_phy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | /* external phy that is used: only valid if dev->if_port != PORT_TP */ |
| 579 | int mii; |
| 580 | int phy_addr_external; |
| 581 | unsigned int full_duplex; |
| 582 | /* Rx filter */ |
| 583 | u32 cur_rx_mode; |
| 584 | u32 rx_filter[16]; |
| 585 | /* FIFO and PCI burst thresholds */ |
| 586 | u32 tx_config, rx_config; |
| 587 | /* original contents of ClkRun register */ |
| 588 | u32 SavedClkRun; |
| 589 | /* silicon revision */ |
| 590 | u32 srr; |
| 591 | /* expected DSPCFG value */ |
| 592 | u16 dspcfg; |
| 593 | /* parms saved in ethtool format */ |
| 594 | u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */ |
| 595 | u8 duplex; /* Duplex, half or full */ |
| 596 | u8 autoneg; /* Autonegotiation enabled */ |
| 597 | /* MII transceiver section */ |
| 598 | u16 advertising; |
| 599 | unsigned int iosize; |
| 600 | spinlock_t lock; |
| 601 | u32 msg_enable; |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 602 | /* EEPROM data */ |
| 603 | int eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | }; |
| 605 | |
| 606 | static void move_int_phy(struct net_device *dev, int addr); |
| 607 | static int eeprom_read(void __iomem *ioaddr, int location); |
| 608 | static int mdio_read(struct net_device *dev, int reg); |
| 609 | static void mdio_write(struct net_device *dev, int reg, u16 data); |
| 610 | static void init_phy_fixup(struct net_device *dev); |
| 611 | static int miiport_read(struct net_device *dev, int phy_id, int reg); |
| 612 | static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data); |
| 613 | static int find_mii(struct net_device *dev); |
| 614 | static void natsemi_reset(struct net_device *dev); |
| 615 | static void natsemi_reload_eeprom(struct net_device *dev); |
| 616 | static void natsemi_stop_rxtx(struct net_device *dev); |
| 617 | static int netdev_open(struct net_device *dev); |
| 618 | static void do_cable_magic(struct net_device *dev); |
| 619 | static void undo_cable_magic(struct net_device *dev); |
| 620 | static void check_link(struct net_device *dev); |
| 621 | static void netdev_timer(unsigned long data); |
| 622 | static void dump_ring(struct net_device *dev); |
| 623 | static void tx_timeout(struct net_device *dev); |
| 624 | static int alloc_ring(struct net_device *dev); |
| 625 | static void refill_rx(struct net_device *dev); |
| 626 | static void init_ring(struct net_device *dev); |
| 627 | static void drain_tx(struct net_device *dev); |
| 628 | static void drain_ring(struct net_device *dev); |
| 629 | static void free_ring(struct net_device *dev); |
| 630 | static void reinit_ring(struct net_device *dev); |
| 631 | static void init_registers(struct net_device *dev); |
| 632 | static int start_tx(struct sk_buff *skb, struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 633 | static irqreturn_t intr_handler(int irq, void *dev_instance); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | static void netdev_error(struct net_device *dev, int intr_status); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 635 | static int natsemi_poll(struct net_device *dev, int *budget); |
| 636 | static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | static void netdev_tx_done(struct net_device *dev); |
| 638 | static int natsemi_change_mtu(struct net_device *dev, int new_mtu); |
| 639 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 640 | static void natsemi_poll_controller(struct net_device *dev); |
| 641 | #endif |
| 642 | static void __set_rx_mode(struct net_device *dev); |
| 643 | static void set_rx_mode(struct net_device *dev); |
| 644 | static void __get_stats(struct net_device *dev); |
| 645 | static struct net_device_stats *get_stats(struct net_device *dev); |
| 646 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| 647 | static int netdev_set_wol(struct net_device *dev, u32 newval); |
| 648 | static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur); |
| 649 | static int netdev_set_sopass(struct net_device *dev, u8 *newval); |
| 650 | static int netdev_get_sopass(struct net_device *dev, u8 *data); |
| 651 | static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd); |
| 652 | static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd); |
| 653 | static void enable_wol_mode(struct net_device *dev, int enable_intr); |
| 654 | static int netdev_close(struct net_device *dev); |
| 655 | static int netdev_get_regs(struct net_device *dev, u8 *buf); |
| 656 | static int netdev_get_eeprom(struct net_device *dev, u8 *buf); |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 657 | static const struct ethtool_ops ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
| 659 | static inline void __iomem *ns_ioaddr(struct net_device *dev) |
| 660 | { |
| 661 | return (void __iomem *) dev->base_addr; |
| 662 | } |
| 663 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 664 | static inline void natsemi_irq_enable(struct net_device *dev) |
| 665 | { |
| 666 | writel(1, ns_ioaddr(dev) + IntrEnable); |
| 667 | readl(ns_ioaddr(dev) + IntrEnable); |
| 668 | } |
| 669 | |
| 670 | static inline void natsemi_irq_disable(struct net_device *dev) |
| 671 | { |
| 672 | writel(0, ns_ioaddr(dev) + IntrEnable); |
| 673 | readl(ns_ioaddr(dev) + IntrEnable); |
| 674 | } |
| 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | static void move_int_phy(struct net_device *dev, int addr) |
| 677 | { |
| 678 | struct netdev_private *np = netdev_priv(dev); |
| 679 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 680 | int target = 31; |
| 681 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 682 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | * The internal phy is visible on the external mii bus. Therefore we must |
| 684 | * move it away before we can send commands to an external phy. |
| 685 | * There are two addresses we must avoid: |
| 686 | * - the address on the external phy that is used for transmission. |
| 687 | * - the address that we want to access. User space can access phys |
| 688 | * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the |
| 689 | * phy that is used for transmission. |
| 690 | */ |
| 691 | |
| 692 | if (target == addr) |
| 693 | target--; |
| 694 | if (target == np->phy_addr_external) |
| 695 | target--; |
| 696 | writew(target, ioaddr + PhyCtrl); |
| 697 | readw(ioaddr + PhyCtrl); |
| 698 | udelay(1); |
| 699 | } |
| 700 | |
Jeff Garzik | 5a40f09 | 2006-06-26 22:24:03 -0400 | [diff] [blame] | 701 | static void __devinit natsemi_init_media (struct net_device *dev) |
| 702 | { |
| 703 | struct netdev_private *np = netdev_priv(dev); |
| 704 | u32 tmp; |
| 705 | |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 706 | if (np->ignore_phy) |
| 707 | netif_carrier_on(dev); |
| 708 | else |
| 709 | netif_carrier_off(dev); |
Jeff Garzik | 5a40f09 | 2006-06-26 22:24:03 -0400 | [diff] [blame] | 710 | |
| 711 | /* get the initial settings from hardware */ |
| 712 | tmp = mdio_read(dev, MII_BMCR); |
| 713 | np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10; |
| 714 | np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF; |
| 715 | np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE; |
| 716 | np->advertising= mdio_read(dev, MII_ADVERTISE); |
| 717 | |
| 718 | if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL |
| 719 | && netif_msg_probe(np)) { |
| 720 | printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s " |
| 721 | "10%s %s duplex.\n", |
| 722 | pci_name(np->pci_dev), |
| 723 | (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)? |
| 724 | "enabled, advertise" : "disabled, force", |
| 725 | (np->advertising & |
| 726 | (ADVERTISE_100FULL|ADVERTISE_100HALF))? |
| 727 | "0" : "", |
| 728 | (np->advertising & |
| 729 | (ADVERTISE_100FULL|ADVERTISE_10FULL))? |
| 730 | "full" : "half"); |
| 731 | } |
| 732 | if (netif_msg_probe(np)) |
| 733 | printk(KERN_INFO |
| 734 | "natsemi %s: Transceiver status %#04x advertising %#04x.\n", |
| 735 | pci_name(np->pci_dev), mdio_read(dev, MII_BMSR), |
| 736 | np->advertising); |
| 737 | |
| 738 | } |
| 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | static int __devinit natsemi_probe1 (struct pci_dev *pdev, |
| 741 | const struct pci_device_id *ent) |
| 742 | { |
| 743 | struct net_device *dev; |
| 744 | struct netdev_private *np; |
| 745 | int i, option, irq, chip_idx = ent->driver_data; |
| 746 | static int find_cnt = -1; |
| 747 | unsigned long iostart, iosize; |
| 748 | void __iomem *ioaddr; |
| 749 | const int pcibar = 1; /* PCI base address register */ |
| 750 | int prev_eedata; |
| 751 | u32 tmp; |
| 752 | |
| 753 | /* when built into the kernel, we only print version if device is found */ |
| 754 | #ifndef MODULE |
| 755 | static int printed_version; |
| 756 | if (!printed_version++) |
| 757 | printk(version); |
| 758 | #endif |
| 759 | |
| 760 | i = pci_enable_device(pdev); |
| 761 | if (i) return i; |
| 762 | |
| 763 | /* natsemi has a non-standard PM control register |
| 764 | * in PCI config space. Some boards apparently need |
| 765 | * to be brought to D0 in this manner. |
| 766 | */ |
| 767 | pci_read_config_dword(pdev, PCIPM, &tmp); |
| 768 | if (tmp & PCI_PM_CTRL_STATE_MASK) { |
| 769 | /* D0 state, disable PME assertion */ |
| 770 | u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK; |
| 771 | pci_write_config_dword(pdev, PCIPM, newtmp); |
| 772 | } |
| 773 | |
| 774 | find_cnt++; |
| 775 | iostart = pci_resource_start(pdev, pcibar); |
| 776 | iosize = pci_resource_len(pdev, pcibar); |
| 777 | irq = pdev->irq; |
| 778 | |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 779 | pci_set_master(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | dev = alloc_etherdev(sizeof (struct netdev_private)); |
| 782 | if (!dev) |
| 783 | return -ENOMEM; |
| 784 | SET_MODULE_OWNER(dev); |
| 785 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 786 | |
| 787 | i = pci_request_regions(pdev, DRV_NAME); |
| 788 | if (i) |
| 789 | goto err_pci_request_regions; |
| 790 | |
| 791 | ioaddr = ioremap(iostart, iosize); |
| 792 | if (!ioaddr) { |
| 793 | i = -ENOMEM; |
| 794 | goto err_ioremap; |
| 795 | } |
| 796 | |
| 797 | /* Work around the dropped serial bit. */ |
| 798 | prev_eedata = eeprom_read(ioaddr, 6); |
| 799 | for (i = 0; i < 3; i++) { |
| 800 | int eedata = eeprom_read(ioaddr, i + 7); |
| 801 | dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15); |
| 802 | dev->dev_addr[i*2+1] = eedata >> 7; |
| 803 | prev_eedata = eedata; |
| 804 | } |
| 805 | |
| 806 | dev->base_addr = (unsigned long __force) ioaddr; |
| 807 | dev->irq = irq; |
| 808 | |
| 809 | np = netdev_priv(dev); |
| 810 | |
| 811 | np->pci_dev = pdev; |
| 812 | pci_set_drvdata(pdev, dev); |
| 813 | np->iosize = iosize; |
| 814 | spin_lock_init(&np->lock); |
| 815 | np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG; |
| 816 | np->hands_off = 0; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 817 | np->intr_status = 0; |
Jeff Garzik | a2b524b | 2006-06-26 22:48:38 -0400 | [diff] [blame] | 818 | np->eeprom_size = natsemi_pci_info[chip_idx].eeprom_size; |
Mark Brown | 6aab444 | 2007-02-19 20:15:40 +0000 | [diff] [blame] | 819 | if (natsemi_pci_info[chip_idx].flags & NATSEMI_FLAG_IGNORE_PHY) |
| 820 | np->ignore_phy = 1; |
| 821 | else |
| 822 | np->ignore_phy = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
| 824 | /* Initial port: |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 825 | * - If configured to ignore the PHY set up for external. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | * - If the nic was configured to use an external phy and if find_mii |
| 827 | * finds a phy: use external port, first phy that replies. |
| 828 | * - Otherwise: internal port. |
| 829 | * Note that the phy address for the internal phy doesn't matter: |
| 830 | * The address would be used to access a phy over the mii bus, but |
| 831 | * the internal phy is accessed through mapped registers. |
| 832 | */ |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 833 | if (np->ignore_phy || readl(ioaddr + ChipConfig) & CfgExtPhy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | dev->if_port = PORT_MII; |
| 835 | else |
| 836 | dev->if_port = PORT_TP; |
| 837 | /* Reset the chip to erase previous misconfiguration. */ |
| 838 | natsemi_reload_eeprom(dev); |
| 839 | natsemi_reset(dev); |
| 840 | |
| 841 | if (dev->if_port != PORT_TP) { |
| 842 | np->phy_addr_external = find_mii(dev); |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 843 | /* If we're ignoring the PHY it doesn't matter if we can't |
| 844 | * find one. */ |
| 845 | if (!np->ignore_phy && np->phy_addr_external == PHY_ADDR_NONE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | dev->if_port = PORT_TP; |
| 847 | np->phy_addr_external = PHY_ADDR_INTERNAL; |
| 848 | } |
| 849 | } else { |
| 850 | np->phy_addr_external = PHY_ADDR_INTERNAL; |
| 851 | } |
| 852 | |
| 853 | option = find_cnt < MAX_UNITS ? options[find_cnt] : 0; |
| 854 | if (dev->mem_start) |
| 855 | option = dev->mem_start; |
| 856 | |
| 857 | /* The lower four bits are the media type. */ |
| 858 | if (option) { |
| 859 | if (option & 0x200) |
| 860 | np->full_duplex = 1; |
| 861 | if (option & 15) |
| 862 | printk(KERN_INFO |
| 863 | "natsemi %s: ignoring user supplied media type %d", |
| 864 | pci_name(np->pci_dev), option & 15); |
| 865 | } |
| 866 | if (find_cnt < MAX_UNITS && full_duplex[find_cnt]) |
| 867 | np->full_duplex = 1; |
| 868 | |
| 869 | /* The chip-specific entries in the device structure. */ |
| 870 | dev->open = &netdev_open; |
| 871 | dev->hard_start_xmit = &start_tx; |
| 872 | dev->stop = &netdev_close; |
| 873 | dev->get_stats = &get_stats; |
| 874 | dev->set_multicast_list = &set_rx_mode; |
| 875 | dev->change_mtu = &natsemi_change_mtu; |
| 876 | dev->do_ioctl = &netdev_ioctl; |
| 877 | dev->tx_timeout = &tx_timeout; |
| 878 | dev->watchdog_timeo = TX_TIMEOUT; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 879 | dev->poll = natsemi_poll; |
| 880 | dev->weight = 64; |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 883 | dev->poll_controller = &natsemi_poll_controller; |
| 884 | #endif |
| 885 | SET_ETHTOOL_OPS(dev, ðtool_ops); |
| 886 | |
| 887 | if (mtu) |
| 888 | dev->mtu = mtu; |
| 889 | |
Jeff Garzik | 5a40f09 | 2006-06-26 22:24:03 -0400 | [diff] [blame] | 890 | natsemi_init_media(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
| 892 | /* save the silicon revision for later querying */ |
| 893 | np->srr = readl(ioaddr + SiliconRev); |
| 894 | if (netif_msg_hw(np)) |
| 895 | printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n", |
| 896 | pci_name(np->pci_dev), np->srr); |
| 897 | |
| 898 | i = register_netdev(dev); |
| 899 | if (i) |
| 900 | goto err_register_netdev; |
| 901 | |
| 902 | if (netif_msg_drv(np)) { |
| 903 | printk(KERN_INFO "natsemi %s: %s at %#08lx (%s), ", |
| 904 | dev->name, natsemi_pci_info[chip_idx].name, iostart, |
| 905 | pci_name(np->pci_dev)); |
| 906 | for (i = 0; i < ETH_ALEN-1; i++) |
| 907 | printk("%02x:", dev->dev_addr[i]); |
| 908 | printk("%02x, IRQ %d", dev->dev_addr[i], irq); |
| 909 | if (dev->if_port == PORT_TP) |
| 910 | printk(", port TP.\n"); |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 911 | else if (np->ignore_phy) |
| 912 | printk(", port MII, ignoring PHY\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | else |
| 914 | printk(", port MII, phy ad %d.\n", np->phy_addr_external); |
| 915 | } |
| 916 | return 0; |
| 917 | |
| 918 | err_register_netdev: |
| 919 | iounmap(ioaddr); |
| 920 | |
| 921 | err_ioremap: |
| 922 | pci_release_regions(pdev); |
| 923 | pci_set_drvdata(pdev, NULL); |
| 924 | |
| 925 | err_pci_request_regions: |
| 926 | free_netdev(dev); |
| 927 | return i; |
| 928 | } |
| 929 | |
| 930 | |
| 931 | /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. |
| 932 | The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */ |
| 933 | |
| 934 | /* Delay between EEPROM clock transitions. |
| 935 | No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need |
| 936 | a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that |
| 937 | made udelay() unreliable. |
| 938 | The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is |
| 939 | depricated. |
| 940 | */ |
| 941 | #define eeprom_delay(ee_addr) readl(ee_addr) |
| 942 | |
| 943 | #define EE_Write0 (EE_ChipSelect) |
| 944 | #define EE_Write1 (EE_ChipSelect | EE_DataIn) |
| 945 | |
| 946 | /* The EEPROM commands include the alway-set leading bit. */ |
| 947 | enum EEPROM_Cmds { |
| 948 | EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6), |
| 949 | }; |
| 950 | |
| 951 | static int eeprom_read(void __iomem *addr, int location) |
| 952 | { |
| 953 | int i; |
| 954 | int retval = 0; |
| 955 | void __iomem *ee_addr = addr + EECtrl; |
| 956 | int read_cmd = location | EE_ReadCmd; |
| 957 | |
| 958 | writel(EE_Write0, ee_addr); |
| 959 | |
| 960 | /* Shift the read command bits out. */ |
| 961 | for (i = 10; i >= 0; i--) { |
| 962 | short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0; |
| 963 | writel(dataval, ee_addr); |
| 964 | eeprom_delay(ee_addr); |
| 965 | writel(dataval | EE_ShiftClk, ee_addr); |
| 966 | eeprom_delay(ee_addr); |
| 967 | } |
| 968 | writel(EE_ChipSelect, ee_addr); |
| 969 | eeprom_delay(ee_addr); |
| 970 | |
| 971 | for (i = 0; i < 16; i++) { |
| 972 | writel(EE_ChipSelect | EE_ShiftClk, ee_addr); |
| 973 | eeprom_delay(ee_addr); |
| 974 | retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0; |
| 975 | writel(EE_ChipSelect, ee_addr); |
| 976 | eeprom_delay(ee_addr); |
| 977 | } |
| 978 | |
| 979 | /* Terminate the EEPROM access. */ |
| 980 | writel(EE_Write0, ee_addr); |
| 981 | writel(0, ee_addr); |
| 982 | return retval; |
| 983 | } |
| 984 | |
| 985 | /* MII transceiver control section. |
| 986 | * The 83815 series has an internal transceiver, and we present the |
| 987 | * internal management registers as if they were MII connected. |
| 988 | * External Phy registers are referenced through the MII interface. |
| 989 | */ |
| 990 | |
| 991 | /* clock transitions >= 20ns (25MHz) |
| 992 | * One readl should be good to PCI @ 100MHz |
| 993 | */ |
| 994 | #define mii_delay(ioaddr) readl(ioaddr + EECtrl) |
| 995 | |
| 996 | static int mii_getbit (struct net_device *dev) |
| 997 | { |
| 998 | int data; |
| 999 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1000 | |
| 1001 | writel(MII_ShiftClk, ioaddr + EECtrl); |
| 1002 | data = readl(ioaddr + EECtrl); |
| 1003 | writel(0, ioaddr + EECtrl); |
| 1004 | mii_delay(ioaddr); |
| 1005 | return (data & MII_Data)? 1 : 0; |
| 1006 | } |
| 1007 | |
| 1008 | static void mii_send_bits (struct net_device *dev, u32 data, int len) |
| 1009 | { |
| 1010 | u32 i; |
| 1011 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1012 | |
| 1013 | for (i = (1 << (len-1)); i; i >>= 1) |
| 1014 | { |
| 1015 | u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0); |
| 1016 | writel(mdio_val, ioaddr + EECtrl); |
| 1017 | mii_delay(ioaddr); |
| 1018 | writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl); |
| 1019 | mii_delay(ioaddr); |
| 1020 | } |
| 1021 | writel(0, ioaddr + EECtrl); |
| 1022 | mii_delay(ioaddr); |
| 1023 | } |
| 1024 | |
| 1025 | static int miiport_read(struct net_device *dev, int phy_id, int reg) |
| 1026 | { |
| 1027 | u32 cmd; |
| 1028 | int i; |
| 1029 | u32 retval = 0; |
| 1030 | |
| 1031 | /* Ensure sync */ |
| 1032 | mii_send_bits (dev, 0xffffffff, 32); |
| 1033 | /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */ |
| 1034 | /* ST,OP = 0110'b for read operation */ |
| 1035 | cmd = (0x06 << 10) | (phy_id << 5) | reg; |
| 1036 | mii_send_bits (dev, cmd, 14); |
| 1037 | /* Turnaround */ |
| 1038 | if (mii_getbit (dev)) |
| 1039 | return 0; |
| 1040 | /* Read data */ |
| 1041 | for (i = 0; i < 16; i++) { |
| 1042 | retval <<= 1; |
| 1043 | retval |= mii_getbit (dev); |
| 1044 | } |
| 1045 | /* End cycle */ |
| 1046 | mii_getbit (dev); |
| 1047 | return retval; |
| 1048 | } |
| 1049 | |
| 1050 | static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data) |
| 1051 | { |
| 1052 | u32 cmd; |
| 1053 | |
| 1054 | /* Ensure sync */ |
| 1055 | mii_send_bits (dev, 0xffffffff, 32); |
| 1056 | /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */ |
| 1057 | /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */ |
| 1058 | cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data; |
| 1059 | mii_send_bits (dev, cmd, 32); |
| 1060 | /* End cycle */ |
| 1061 | mii_getbit (dev); |
| 1062 | } |
| 1063 | |
| 1064 | static int mdio_read(struct net_device *dev, int reg) |
| 1065 | { |
| 1066 | struct netdev_private *np = netdev_priv(dev); |
| 1067 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1068 | |
| 1069 | /* The 83815 series has two ports: |
| 1070 | * - an internal transceiver |
| 1071 | * - an external mii bus |
| 1072 | */ |
| 1073 | if (dev->if_port == PORT_TP) |
| 1074 | return readw(ioaddr+BasicControl+(reg<<2)); |
| 1075 | else |
| 1076 | return miiport_read(dev, np->phy_addr_external, reg); |
| 1077 | } |
| 1078 | |
| 1079 | static void mdio_write(struct net_device *dev, int reg, u16 data) |
| 1080 | { |
| 1081 | struct netdev_private *np = netdev_priv(dev); |
| 1082 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1083 | |
| 1084 | /* The 83815 series has an internal transceiver; handle separately */ |
| 1085 | if (dev->if_port == PORT_TP) |
| 1086 | writew(data, ioaddr+BasicControl+(reg<<2)); |
| 1087 | else |
| 1088 | miiport_write(dev, np->phy_addr_external, reg, data); |
| 1089 | } |
| 1090 | |
| 1091 | static void init_phy_fixup(struct net_device *dev) |
| 1092 | { |
| 1093 | struct netdev_private *np = netdev_priv(dev); |
| 1094 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1095 | int i; |
| 1096 | u32 cfg; |
| 1097 | u16 tmp; |
| 1098 | |
| 1099 | /* restore stuff lost when power was out */ |
| 1100 | tmp = mdio_read(dev, MII_BMCR); |
| 1101 | if (np->autoneg == AUTONEG_ENABLE) { |
| 1102 | /* renegotiate if something changed */ |
| 1103 | if ((tmp & BMCR_ANENABLE) == 0 |
| 1104 | || np->advertising != mdio_read(dev, MII_ADVERTISE)) |
| 1105 | { |
| 1106 | /* turn on autonegotiation and force negotiation */ |
| 1107 | tmp |= (BMCR_ANENABLE | BMCR_ANRESTART); |
| 1108 | mdio_write(dev, MII_ADVERTISE, np->advertising); |
| 1109 | } |
| 1110 | } else { |
| 1111 | /* turn off auto negotiation, set speed and duplexity */ |
| 1112 | tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX); |
| 1113 | if (np->speed == SPEED_100) |
| 1114 | tmp |= BMCR_SPEED100; |
| 1115 | if (np->duplex == DUPLEX_FULL) |
| 1116 | tmp |= BMCR_FULLDPLX; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1117 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | * Note: there is no good way to inform the link partner |
| 1119 | * that our capabilities changed. The user has to unplug |
| 1120 | * and replug the network cable after some changes, e.g. |
| 1121 | * after switching from 10HD, autoneg off to 100 HD, |
| 1122 | * autoneg off. |
| 1123 | */ |
| 1124 | } |
| 1125 | mdio_write(dev, MII_BMCR, tmp); |
| 1126 | readl(ioaddr + ChipConfig); |
| 1127 | udelay(1); |
| 1128 | |
| 1129 | /* find out what phy this is */ |
| 1130 | np->mii = (mdio_read(dev, MII_PHYSID1) << 16) |
| 1131 | + mdio_read(dev, MII_PHYSID2); |
| 1132 | |
| 1133 | /* handle external phys here */ |
| 1134 | switch (np->mii) { |
| 1135 | case PHYID_AM79C874: |
| 1136 | /* phy specific configuration for fibre/tp operation */ |
| 1137 | tmp = mdio_read(dev, MII_MCTRL); |
| 1138 | tmp &= ~(MII_FX_SEL | MII_EN_SCRM); |
| 1139 | if (dev->if_port == PORT_FIBRE) |
| 1140 | tmp |= MII_FX_SEL; |
| 1141 | else |
| 1142 | tmp |= MII_EN_SCRM; |
| 1143 | mdio_write(dev, MII_MCTRL, tmp); |
| 1144 | break; |
| 1145 | default: |
| 1146 | break; |
| 1147 | } |
| 1148 | cfg = readl(ioaddr + ChipConfig); |
| 1149 | if (cfg & CfgExtPhy) |
| 1150 | return; |
| 1151 | |
| 1152 | /* On page 78 of the spec, they recommend some settings for "optimum |
| 1153 | performance" to be done in sequence. These settings optimize some |
| 1154 | of the 100Mbit autodetection circuitry. They say we only want to |
| 1155 | do this for rev C of the chip, but engineers at NSC (Bradley |
| 1156 | Kennedy) recommends always setting them. If you don't, you get |
| 1157 | errors on some autonegotiations that make the device unusable. |
| 1158 | |
| 1159 | It seems that the DSP needs a few usec to reinitialize after |
| 1160 | the start of the phy. Just retry writing these values until they |
| 1161 | stick. |
| 1162 | */ |
| 1163 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1164 | |
| 1165 | int dspcfg; |
| 1166 | writew(1, ioaddr + PGSEL); |
| 1167 | writew(PMDCSR_VAL, ioaddr + PMDCSR); |
| 1168 | writew(TSTDAT_VAL, ioaddr + TSTDAT); |
| 1169 | np->dspcfg = (np->srr <= SRR_DP83815_C)? |
| 1170 | DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG)); |
| 1171 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1172 | writew(SDCFG_VAL, ioaddr + SDCFG); |
| 1173 | writew(0, ioaddr + PGSEL); |
| 1174 | readl(ioaddr + ChipConfig); |
| 1175 | udelay(10); |
| 1176 | |
| 1177 | writew(1, ioaddr + PGSEL); |
| 1178 | dspcfg = readw(ioaddr + DSPCFG); |
| 1179 | writew(0, ioaddr + PGSEL); |
| 1180 | if (np->dspcfg == dspcfg) |
| 1181 | break; |
| 1182 | } |
| 1183 | |
| 1184 | if (netif_msg_link(np)) { |
| 1185 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1186 | printk(KERN_INFO |
| 1187 | "%s: DSPCFG mismatch after retrying for %d usec.\n", |
| 1188 | dev->name, i*10); |
| 1189 | } else { |
| 1190 | printk(KERN_INFO |
| 1191 | "%s: DSPCFG accepted after %d usec.\n", |
| 1192 | dev->name, i*10); |
| 1193 | } |
| 1194 | } |
| 1195 | /* |
| 1196 | * Enable PHY Specific event based interrupts. Link state change |
| 1197 | * and Auto-Negotiation Completion are among the affected. |
| 1198 | * Read the intr status to clear it (needed for wake events). |
| 1199 | */ |
| 1200 | readw(ioaddr + MIntrStatus); |
| 1201 | writew(MICRIntEn, ioaddr + MIntrCtrl); |
| 1202 | } |
| 1203 | |
| 1204 | static int switch_port_external(struct net_device *dev) |
| 1205 | { |
| 1206 | struct netdev_private *np = netdev_priv(dev); |
| 1207 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1208 | u32 cfg; |
| 1209 | |
| 1210 | cfg = readl(ioaddr + ChipConfig); |
| 1211 | if (cfg & CfgExtPhy) |
| 1212 | return 0; |
| 1213 | |
| 1214 | if (netif_msg_link(np)) { |
| 1215 | printk(KERN_INFO "%s: switching to external transceiver.\n", |
| 1216 | dev->name); |
| 1217 | } |
| 1218 | |
| 1219 | /* 1) switch back to external phy */ |
| 1220 | writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig); |
| 1221 | readl(ioaddr + ChipConfig); |
| 1222 | udelay(1); |
| 1223 | |
| 1224 | /* 2) reset the external phy: */ |
| 1225 | /* resetting the external PHY has been known to cause a hub supplying |
| 1226 | * power over Ethernet to kill the power. We don't want to kill |
| 1227 | * power to this computer, so we avoid resetting the phy. |
| 1228 | */ |
| 1229 | |
| 1230 | /* 3) reinit the phy fixup, it got lost during power down. */ |
| 1231 | move_int_phy(dev, np->phy_addr_external); |
| 1232 | init_phy_fixup(dev); |
| 1233 | |
| 1234 | return 1; |
| 1235 | } |
| 1236 | |
| 1237 | static int switch_port_internal(struct net_device *dev) |
| 1238 | { |
| 1239 | struct netdev_private *np = netdev_priv(dev); |
| 1240 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1241 | int i; |
| 1242 | u32 cfg; |
| 1243 | u16 bmcr; |
| 1244 | |
| 1245 | cfg = readl(ioaddr + ChipConfig); |
| 1246 | if (!(cfg &CfgExtPhy)) |
| 1247 | return 0; |
| 1248 | |
| 1249 | if (netif_msg_link(np)) { |
| 1250 | printk(KERN_INFO "%s: switching to internal transceiver.\n", |
| 1251 | dev->name); |
| 1252 | } |
| 1253 | /* 1) switch back to internal phy: */ |
| 1254 | cfg = cfg & ~(CfgExtPhy | CfgPhyDis); |
| 1255 | writel(cfg, ioaddr + ChipConfig); |
| 1256 | readl(ioaddr + ChipConfig); |
| 1257 | udelay(1); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | /* 2) reset the internal phy: */ |
| 1260 | bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1261 | writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1262 | readl(ioaddr + ChipConfig); |
| 1263 | udelay(10); |
| 1264 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1265 | bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2)); |
| 1266 | if (!(bmcr & BMCR_RESET)) |
| 1267 | break; |
| 1268 | udelay(10); |
| 1269 | } |
| 1270 | if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) { |
| 1271 | printk(KERN_INFO |
| 1272 | "%s: phy reset did not complete in %d usec.\n", |
| 1273 | dev->name, i*10); |
| 1274 | } |
| 1275 | /* 3) reinit the phy fixup, it got lost during power down. */ |
| 1276 | init_phy_fixup(dev); |
| 1277 | |
| 1278 | return 1; |
| 1279 | } |
| 1280 | |
| 1281 | /* Scan for a PHY on the external mii bus. |
| 1282 | * There are two tricky points: |
| 1283 | * - Do not scan while the internal phy is enabled. The internal phy will |
| 1284 | * crash: e.g. reads from the DSPCFG register will return odd values and |
| 1285 | * the nasty random phy reset code will reset the nic every few seconds. |
| 1286 | * - The internal phy must be moved around, an external phy could |
| 1287 | * have the same address as the internal phy. |
| 1288 | */ |
| 1289 | static int find_mii(struct net_device *dev) |
| 1290 | { |
| 1291 | struct netdev_private *np = netdev_priv(dev); |
| 1292 | int tmp; |
| 1293 | int i; |
| 1294 | int did_switch; |
| 1295 | |
| 1296 | /* Switch to external phy */ |
| 1297 | did_switch = switch_port_external(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | /* Scan the possible phy addresses: |
| 1300 | * |
| 1301 | * PHY address 0 means that the phy is in isolate mode. Not yet |
| 1302 | * supported due to lack of test hardware. User space should |
| 1303 | * handle it through ethtool. |
| 1304 | */ |
| 1305 | for (i = 1; i <= 31; i++) { |
| 1306 | move_int_phy(dev, i); |
| 1307 | tmp = miiport_read(dev, i, MII_BMSR); |
| 1308 | if (tmp != 0xffff && tmp != 0x0000) { |
| 1309 | /* found something! */ |
| 1310 | np->mii = (mdio_read(dev, MII_PHYSID1) << 16) |
| 1311 | + mdio_read(dev, MII_PHYSID2); |
| 1312 | if (netif_msg_probe(np)) { |
| 1313 | printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n", |
| 1314 | pci_name(np->pci_dev), np->mii, i); |
| 1315 | } |
| 1316 | break; |
| 1317 | } |
| 1318 | } |
| 1319 | /* And switch back to internal phy: */ |
| 1320 | if (did_switch) |
| 1321 | switch_port_internal(dev); |
| 1322 | return i; |
| 1323 | } |
| 1324 | |
| 1325 | /* CFG bits [13:16] [18:23] */ |
| 1326 | #define CFG_RESET_SAVE 0xfde000 |
| 1327 | /* WCSR bits [0:4] [9:10] */ |
| 1328 | #define WCSR_RESET_SAVE 0x61f |
| 1329 | /* RFCR bits [20] [22] [27:31] */ |
| 1330 | #define RFCR_RESET_SAVE 0xf8500000; |
| 1331 | |
| 1332 | static void natsemi_reset(struct net_device *dev) |
| 1333 | { |
| 1334 | int i; |
| 1335 | u32 cfg; |
| 1336 | u32 wcsr; |
| 1337 | u32 rfcr; |
| 1338 | u16 pmatch[3]; |
| 1339 | u16 sopass[3]; |
| 1340 | struct netdev_private *np = netdev_priv(dev); |
| 1341 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1342 | |
| 1343 | /* |
| 1344 | * Resetting the chip causes some registers to be lost. |
| 1345 | * Natsemi suggests NOT reloading the EEPROM while live, so instead |
| 1346 | * we save the state that would have been loaded from EEPROM |
| 1347 | * on a normal power-up (see the spec EEPROM map). This assumes |
| 1348 | * whoever calls this will follow up with init_registers() eventually. |
| 1349 | */ |
| 1350 | |
| 1351 | /* CFG */ |
| 1352 | cfg = readl(ioaddr + ChipConfig) & CFG_RESET_SAVE; |
| 1353 | /* WCSR */ |
| 1354 | wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE; |
| 1355 | /* RFCR */ |
| 1356 | rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE; |
| 1357 | /* PMATCH */ |
| 1358 | for (i = 0; i < 3; i++) { |
| 1359 | writel(i*2, ioaddr + RxFilterAddr); |
| 1360 | pmatch[i] = readw(ioaddr + RxFilterData); |
| 1361 | } |
| 1362 | /* SOPAS */ |
| 1363 | for (i = 0; i < 3; i++) { |
| 1364 | writel(0xa+(i*2), ioaddr + RxFilterAddr); |
| 1365 | sopass[i] = readw(ioaddr + RxFilterData); |
| 1366 | } |
| 1367 | |
| 1368 | /* now whack the chip */ |
| 1369 | writel(ChipReset, ioaddr + ChipCmd); |
| 1370 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1371 | if (!(readl(ioaddr + ChipCmd) & ChipReset)) |
| 1372 | break; |
| 1373 | udelay(5); |
| 1374 | } |
| 1375 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1376 | printk(KERN_WARNING "%s: reset did not complete in %d usec.\n", |
| 1377 | dev->name, i*5); |
| 1378 | } else if (netif_msg_hw(np)) { |
| 1379 | printk(KERN_DEBUG "%s: reset completed in %d usec.\n", |
| 1380 | dev->name, i*5); |
| 1381 | } |
| 1382 | |
| 1383 | /* restore CFG */ |
| 1384 | cfg |= readl(ioaddr + ChipConfig) & ~CFG_RESET_SAVE; |
| 1385 | /* turn on external phy if it was selected */ |
| 1386 | if (dev->if_port == PORT_TP) |
| 1387 | cfg &= ~(CfgExtPhy | CfgPhyDis); |
| 1388 | else |
| 1389 | cfg |= (CfgExtPhy | CfgPhyDis); |
| 1390 | writel(cfg, ioaddr + ChipConfig); |
| 1391 | /* restore WCSR */ |
| 1392 | wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE; |
| 1393 | writel(wcsr, ioaddr + WOLCmd); |
| 1394 | /* read RFCR */ |
| 1395 | rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE; |
| 1396 | /* restore PMATCH */ |
| 1397 | for (i = 0; i < 3; i++) { |
| 1398 | writel(i*2, ioaddr + RxFilterAddr); |
| 1399 | writew(pmatch[i], ioaddr + RxFilterData); |
| 1400 | } |
| 1401 | for (i = 0; i < 3; i++) { |
| 1402 | writel(0xa+(i*2), ioaddr + RxFilterAddr); |
| 1403 | writew(sopass[i], ioaddr + RxFilterData); |
| 1404 | } |
| 1405 | /* restore RFCR */ |
| 1406 | writel(rfcr, ioaddr + RxFilterAddr); |
| 1407 | } |
| 1408 | |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 1409 | static void reset_rx(struct net_device *dev) |
| 1410 | { |
| 1411 | int i; |
| 1412 | struct netdev_private *np = netdev_priv(dev); |
| 1413 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1414 | |
| 1415 | np->intr_status &= ~RxResetDone; |
| 1416 | |
| 1417 | writel(RxReset, ioaddr + ChipCmd); |
| 1418 | |
| 1419 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1420 | np->intr_status |= readl(ioaddr + IntrStatus); |
| 1421 | if (np->intr_status & RxResetDone) |
| 1422 | break; |
| 1423 | udelay(15); |
| 1424 | } |
| 1425 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1426 | printk(KERN_WARNING "%s: RX reset did not complete in %d usec.\n", |
| 1427 | dev->name, i*15); |
| 1428 | } else if (netif_msg_hw(np)) { |
| 1429 | printk(KERN_WARNING "%s: RX reset took %d usec.\n", |
| 1430 | dev->name, i*15); |
| 1431 | } |
| 1432 | } |
| 1433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | static void natsemi_reload_eeprom(struct net_device *dev) |
| 1435 | { |
| 1436 | struct netdev_private *np = netdev_priv(dev); |
| 1437 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1438 | int i; |
| 1439 | |
| 1440 | writel(EepromReload, ioaddr + PCIBusCfg); |
| 1441 | for (i=0;i<NATSEMI_HW_TIMEOUT;i++) { |
| 1442 | udelay(50); |
| 1443 | if (!(readl(ioaddr + PCIBusCfg) & EepromReload)) |
| 1444 | break; |
| 1445 | } |
| 1446 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1447 | printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n", |
| 1448 | pci_name(np->pci_dev), i*50); |
| 1449 | } else if (netif_msg_hw(np)) { |
| 1450 | printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n", |
| 1451 | pci_name(np->pci_dev), i*50); |
| 1452 | } |
| 1453 | } |
| 1454 | |
| 1455 | static void natsemi_stop_rxtx(struct net_device *dev) |
| 1456 | { |
| 1457 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1458 | struct netdev_private *np = netdev_priv(dev); |
| 1459 | int i; |
| 1460 | |
| 1461 | writel(RxOff | TxOff, ioaddr + ChipCmd); |
| 1462 | for(i=0;i< NATSEMI_HW_TIMEOUT;i++) { |
| 1463 | if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0) |
| 1464 | break; |
| 1465 | udelay(5); |
| 1466 | } |
| 1467 | if (i==NATSEMI_HW_TIMEOUT) { |
| 1468 | printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n", |
| 1469 | dev->name, i*5); |
| 1470 | } else if (netif_msg_hw(np)) { |
| 1471 | printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n", |
| 1472 | dev->name, i*5); |
| 1473 | } |
| 1474 | } |
| 1475 | |
| 1476 | static int netdev_open(struct net_device *dev) |
| 1477 | { |
| 1478 | struct netdev_private *np = netdev_priv(dev); |
| 1479 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1480 | int i; |
| 1481 | |
| 1482 | /* Reset the chip, just in case. */ |
| 1483 | natsemi_reset(dev); |
| 1484 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 1485 | i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | if (i) return i; |
| 1487 | |
| 1488 | if (netif_msg_ifup(np)) |
| 1489 | printk(KERN_DEBUG "%s: netdev_open() irq %d.\n", |
| 1490 | dev->name, dev->irq); |
| 1491 | i = alloc_ring(dev); |
| 1492 | if (i < 0) { |
| 1493 | free_irq(dev->irq, dev); |
| 1494 | return i; |
| 1495 | } |
| 1496 | init_ring(dev); |
| 1497 | spin_lock_irq(&np->lock); |
| 1498 | init_registers(dev); |
| 1499 | /* now set the MAC address according to dev->dev_addr */ |
| 1500 | for (i = 0; i < 3; i++) { |
| 1501 | u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i]; |
| 1502 | |
| 1503 | writel(i*2, ioaddr + RxFilterAddr); |
| 1504 | writew(mac, ioaddr + RxFilterData); |
| 1505 | } |
| 1506 | writel(np->cur_rx_mode, ioaddr + RxFilterAddr); |
| 1507 | spin_unlock_irq(&np->lock); |
| 1508 | |
| 1509 | netif_start_queue(dev); |
| 1510 | |
| 1511 | if (netif_msg_ifup(np)) |
| 1512 | printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n", |
| 1513 | dev->name, (int)readl(ioaddr + ChipCmd)); |
| 1514 | |
| 1515 | /* Set the timer to check for link beat. */ |
| 1516 | init_timer(&np->timer); |
| 1517 | np->timer.expires = jiffies + NATSEMI_TIMER_FREQ; |
| 1518 | np->timer.data = (unsigned long)dev; |
| 1519 | np->timer.function = &netdev_timer; /* timer handler */ |
| 1520 | add_timer(&np->timer); |
| 1521 | |
| 1522 | return 0; |
| 1523 | } |
| 1524 | |
| 1525 | static void do_cable_magic(struct net_device *dev) |
| 1526 | { |
| 1527 | struct netdev_private *np = netdev_priv(dev); |
| 1528 | void __iomem *ioaddr = ns_ioaddr(dev); |
| 1529 | |
| 1530 | if (dev->if_port != PORT_TP) |
| 1531 | return; |
| 1532 | |
| 1533 | if (np->srr >= SRR_DP83816_A5) |
| 1534 | return; |
| 1535 | |
| 1536 | /* |
| 1537 | * 100 MBit links with short cables can trip an issue with the chip. |
| 1538 | * The problem manifests as lots of CRC errors and/or flickering |
| 1539 | * activity LED while idle. This process is based on instructions |
| 1540 | * from engineers at National. |
| 1541 | */ |
| 1542 | if (readl(ioaddr + ChipConfig) & CfgSpeed100) { |
| 1543 | u16 data; |
| 1544 | |
| 1545 | writew(1, ioaddr + PGSEL); |
| 1546 | /* |
| 1547 | * coefficient visibility should already be enabled via |
| 1548 | * DSPCFG | 0x1000 |
| 1549 | */ |
| 1550 | data = readw(ioaddr + TSTDAT) & 0xff; |
| 1551 | /* |
| 1552 | * the value must be negative, and within certain values |
| 1553 | * (these values all come from National) |
| 1554 | */ |
| 1555 | if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) { |
| 1556 | struct netdev_private *np = netdev_priv(dev); |
| 1557 | |
| 1558 | /* the bug has been triggered - fix the coefficient */ |
| 1559 | writew(TSTDAT_FIXED, ioaddr + TSTDAT); |
| 1560 | /* lock the value */ |
| 1561 | data = readw(ioaddr + DSPCFG); |
| 1562 | np->dspcfg = data | DSPCFG_LOCK; |
| 1563 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1564 | } |
| 1565 | writew(0, ioaddr + PGSEL); |
| 1566 | } |
| 1567 | } |
| 1568 | |
| 1569 | static void undo_cable_magic(struct net_device *dev) |
| 1570 | { |
| 1571 | u16 data; |
| 1572 | struct netdev_private *np = netdev_priv(dev); |
| 1573 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1574 | |
| 1575 | if (dev->if_port != PORT_TP) |
| 1576 | return; |
| 1577 | |
| 1578 | if (np->srr >= SRR_DP83816_A5) |
| 1579 | return; |
| 1580 | |
| 1581 | writew(1, ioaddr + PGSEL); |
| 1582 | /* make sure the lock bit is clear */ |
| 1583 | data = readw(ioaddr + DSPCFG); |
| 1584 | np->dspcfg = data & ~DSPCFG_LOCK; |
| 1585 | writew(np->dspcfg, ioaddr + DSPCFG); |
| 1586 | writew(0, ioaddr + PGSEL); |
| 1587 | } |
| 1588 | |
| 1589 | static void check_link(struct net_device *dev) |
| 1590 | { |
| 1591 | struct netdev_private *np = netdev_priv(dev); |
| 1592 | void __iomem * ioaddr = ns_ioaddr(dev); |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 1593 | int duplex = np->duplex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | u16 bmsr; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1595 | |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 1596 | /* If we are ignoring the PHY then don't try reading it. */ |
| 1597 | if (np->ignore_phy) |
| 1598 | goto propagate_state; |
| 1599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | /* The link status field is latched: it remains low after a temporary |
| 1601 | * link failure until it's read. We need the current link status, |
| 1602 | * thus read twice. |
| 1603 | */ |
| 1604 | mdio_read(dev, MII_BMSR); |
| 1605 | bmsr = mdio_read(dev, MII_BMSR); |
| 1606 | |
| 1607 | if (!(bmsr & BMSR_LSTATUS)) { |
| 1608 | if (netif_carrier_ok(dev)) { |
| 1609 | if (netif_msg_link(np)) |
| 1610 | printk(KERN_NOTICE "%s: link down.\n", |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 1611 | dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | netif_carrier_off(dev); |
| 1613 | undo_cable_magic(dev); |
| 1614 | } |
| 1615 | return; |
| 1616 | } |
| 1617 | if (!netif_carrier_ok(dev)) { |
| 1618 | if (netif_msg_link(np)) |
| 1619 | printk(KERN_NOTICE "%s: link up.\n", dev->name); |
| 1620 | netif_carrier_on(dev); |
| 1621 | do_cable_magic(dev); |
| 1622 | } |
| 1623 | |
| 1624 | duplex = np->full_duplex; |
| 1625 | if (!duplex) { |
| 1626 | if (bmsr & BMSR_ANEGCOMPLETE) { |
| 1627 | int tmp = mii_nway_result( |
| 1628 | np->advertising & mdio_read(dev, MII_LPA)); |
| 1629 | if (tmp == LPA_100FULL || tmp == LPA_10FULL) |
| 1630 | duplex = 1; |
| 1631 | } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX) |
| 1632 | duplex = 1; |
| 1633 | } |
| 1634 | |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 1635 | propagate_state: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | /* if duplex is set then bit 28 must be set, too */ |
| 1637 | if (duplex ^ !!(np->rx_config & RxAcceptTx)) { |
| 1638 | if (netif_msg_link(np)) |
| 1639 | printk(KERN_INFO |
| 1640 | "%s: Setting %s-duplex based on negotiated " |
| 1641 | "link capability.\n", dev->name, |
| 1642 | duplex ? "full" : "half"); |
| 1643 | if (duplex) { |
| 1644 | np->rx_config |= RxAcceptTx; |
| 1645 | np->tx_config |= TxCarrierIgn | TxHeartIgn; |
| 1646 | } else { |
| 1647 | np->rx_config &= ~RxAcceptTx; |
| 1648 | np->tx_config &= ~(TxCarrierIgn | TxHeartIgn); |
| 1649 | } |
| 1650 | writel(np->tx_config, ioaddr + TxConfig); |
| 1651 | writel(np->rx_config, ioaddr + RxConfig); |
| 1652 | } |
| 1653 | } |
| 1654 | |
| 1655 | static void init_registers(struct net_device *dev) |
| 1656 | { |
| 1657 | struct netdev_private *np = netdev_priv(dev); |
| 1658 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1659 | |
| 1660 | init_phy_fixup(dev); |
| 1661 | |
| 1662 | /* clear any interrupts that are pending, such as wake events */ |
| 1663 | readl(ioaddr + IntrStatus); |
| 1664 | |
| 1665 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 1666 | writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc), |
| 1667 | ioaddr + TxRingPtr); |
| 1668 | |
| 1669 | /* Initialize other registers. |
| 1670 | * Configure the PCI bus bursts and FIFO thresholds. |
| 1671 | * Configure for standard, in-spec Ethernet. |
| 1672 | * Start with half-duplex. check_link will update |
| 1673 | * to the correct settings. |
| 1674 | */ |
| 1675 | |
| 1676 | /* DRTH: 2: start tx if 64 bytes are in the fifo |
| 1677 | * FLTH: 0x10: refill with next packet if 512 bytes are free |
| 1678 | * MXDMA: 0: up to 256 byte bursts. |
| 1679 | * MXDMA must be <= FLTH |
| 1680 | * ECRETRY=1 |
| 1681 | * ATP=1 |
| 1682 | */ |
| 1683 | np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | |
| 1684 | TX_FLTH_VAL | TX_DRTH_VAL_START; |
| 1685 | writel(np->tx_config, ioaddr + TxConfig); |
| 1686 | |
| 1687 | /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo |
| 1688 | * MXDMA 0: up to 256 byte bursts |
| 1689 | */ |
| 1690 | np->rx_config = RxMxdma_256 | RX_DRTH_VAL; |
| 1691 | /* if receive ring now has bigger buffers than normal, enable jumbo */ |
| 1692 | if (np->rx_buf_sz > NATSEMI_LONGPKT) |
| 1693 | np->rx_config |= RxAcceptLong; |
| 1694 | |
| 1695 | writel(np->rx_config, ioaddr + RxConfig); |
| 1696 | |
| 1697 | /* Disable PME: |
| 1698 | * The PME bit is initialized from the EEPROM contents. |
| 1699 | * PCI cards probably have PME disabled, but motherboard |
| 1700 | * implementations may have PME set to enable WakeOnLan. |
| 1701 | * With PME set the chip will scan incoming packets but |
| 1702 | * nothing will be written to memory. */ |
| 1703 | np->SavedClkRun = readl(ioaddr + ClkRun); |
| 1704 | writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun); |
| 1705 | if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) { |
| 1706 | printk(KERN_NOTICE "%s: Wake-up event %#08x\n", |
| 1707 | dev->name, readl(ioaddr + WOLCmd)); |
| 1708 | } |
| 1709 | |
| 1710 | check_link(dev); |
| 1711 | __set_rx_mode(dev); |
| 1712 | |
| 1713 | /* Enable interrupts by setting the interrupt mask. */ |
| 1714 | writel(DEFAULT_INTR, ioaddr + IntrMask); |
broonie@sirena.org.uk | 14fdd90 | 2007-03-14 19:49:13 +0000 | [diff] [blame] | 1715 | natsemi_irq_enable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | |
| 1717 | writel(RxOn | TxOn, ioaddr + ChipCmd); |
| 1718 | writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */ |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * netdev_timer: |
| 1723 | * Purpose: |
| 1724 | * 1) check for link changes. Usually they are handled by the MII interrupt |
| 1725 | * but it doesn't hurt to check twice. |
| 1726 | * 2) check for sudden death of the NIC: |
| 1727 | * It seems that a reference set for this chip went out with incorrect info, |
| 1728 | * and there exist boards that aren't quite right. An unexpected voltage |
| 1729 | * drop can cause the PHY to get itself in a weird state (basically reset). |
| 1730 | * NOTE: this only seems to affect revC chips. |
| 1731 | * 3) check of death of the RX path due to OOM |
| 1732 | */ |
| 1733 | static void netdev_timer(unsigned long data) |
| 1734 | { |
| 1735 | struct net_device *dev = (struct net_device *)data; |
| 1736 | struct netdev_private *np = netdev_priv(dev); |
| 1737 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1738 | int next_tick = 5*HZ; |
| 1739 | |
| 1740 | if (netif_msg_timer(np)) { |
| 1741 | /* DO NOT read the IntrStatus register, |
| 1742 | * a read clears any pending interrupts. |
| 1743 | */ |
| 1744 | printk(KERN_DEBUG "%s: Media selection timer tick.\n", |
| 1745 | dev->name); |
| 1746 | } |
| 1747 | |
| 1748 | if (dev->if_port == PORT_TP) { |
| 1749 | u16 dspcfg; |
| 1750 | |
| 1751 | spin_lock_irq(&np->lock); |
| 1752 | /* check for a nasty random phy-reset - use dspcfg as a flag */ |
| 1753 | writew(1, ioaddr+PGSEL); |
| 1754 | dspcfg = readw(ioaddr+DSPCFG); |
| 1755 | writew(0, ioaddr+PGSEL); |
| 1756 | if (dspcfg != np->dspcfg) { |
| 1757 | if (!netif_queue_stopped(dev)) { |
| 1758 | spin_unlock_irq(&np->lock); |
| 1759 | if (netif_msg_hw(np)) |
| 1760 | printk(KERN_NOTICE "%s: possible phy reset: " |
| 1761 | "re-initializing\n", dev->name); |
| 1762 | disable_irq(dev->irq); |
| 1763 | spin_lock_irq(&np->lock); |
| 1764 | natsemi_stop_rxtx(dev); |
| 1765 | dump_ring(dev); |
| 1766 | reinit_ring(dev); |
| 1767 | init_registers(dev); |
| 1768 | spin_unlock_irq(&np->lock); |
| 1769 | enable_irq(dev->irq); |
| 1770 | } else { |
| 1771 | /* hurry back */ |
| 1772 | next_tick = HZ; |
| 1773 | spin_unlock_irq(&np->lock); |
| 1774 | } |
| 1775 | } else { |
| 1776 | /* init_registers() calls check_link() for the above case */ |
| 1777 | check_link(dev); |
| 1778 | spin_unlock_irq(&np->lock); |
| 1779 | } |
| 1780 | } else { |
| 1781 | spin_lock_irq(&np->lock); |
| 1782 | check_link(dev); |
| 1783 | spin_unlock_irq(&np->lock); |
| 1784 | } |
| 1785 | if (np->oom) { |
| 1786 | disable_irq(dev->irq); |
| 1787 | np->oom = 0; |
| 1788 | refill_rx(dev); |
| 1789 | enable_irq(dev->irq); |
| 1790 | if (!np->oom) { |
| 1791 | writel(RxOn, ioaddr + ChipCmd); |
| 1792 | } else { |
| 1793 | next_tick = 1; |
| 1794 | } |
| 1795 | } |
| 1796 | mod_timer(&np->timer, jiffies + next_tick); |
| 1797 | } |
| 1798 | |
| 1799 | static void dump_ring(struct net_device *dev) |
| 1800 | { |
| 1801 | struct netdev_private *np = netdev_priv(dev); |
| 1802 | |
| 1803 | if (netif_msg_pktdata(np)) { |
| 1804 | int i; |
| 1805 | printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring); |
| 1806 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1807 | printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n", |
| 1808 | i, np->tx_ring[i].next_desc, |
| 1809 | np->tx_ring[i].cmd_status, |
| 1810 | np->tx_ring[i].addr); |
| 1811 | } |
| 1812 | printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring); |
| 1813 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1814 | printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n", |
| 1815 | i, np->rx_ring[i].next_desc, |
| 1816 | np->rx_ring[i].cmd_status, |
| 1817 | np->rx_ring[i].addr); |
| 1818 | } |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | static void tx_timeout(struct net_device *dev) |
| 1823 | { |
| 1824 | struct netdev_private *np = netdev_priv(dev); |
| 1825 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 1826 | |
| 1827 | disable_irq(dev->irq); |
| 1828 | spin_lock_irq(&np->lock); |
| 1829 | if (!np->hands_off) { |
| 1830 | if (netif_msg_tx_err(np)) |
| 1831 | printk(KERN_WARNING |
| 1832 | "%s: Transmit timed out, status %#08x," |
| 1833 | " resetting...\n", |
| 1834 | dev->name, readl(ioaddr + IntrStatus)); |
| 1835 | dump_ring(dev); |
| 1836 | |
| 1837 | natsemi_reset(dev); |
| 1838 | reinit_ring(dev); |
| 1839 | init_registers(dev); |
| 1840 | } else { |
| 1841 | printk(KERN_WARNING |
| 1842 | "%s: tx_timeout while in hands_off state?\n", |
| 1843 | dev->name); |
| 1844 | } |
| 1845 | spin_unlock_irq(&np->lock); |
| 1846 | enable_irq(dev->irq); |
| 1847 | |
| 1848 | dev->trans_start = jiffies; |
| 1849 | np->stats.tx_errors++; |
| 1850 | netif_wake_queue(dev); |
| 1851 | } |
| 1852 | |
| 1853 | static int alloc_ring(struct net_device *dev) |
| 1854 | { |
| 1855 | struct netdev_private *np = netdev_priv(dev); |
| 1856 | np->rx_ring = pci_alloc_consistent(np->pci_dev, |
| 1857 | sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE), |
| 1858 | &np->ring_dma); |
| 1859 | if (!np->rx_ring) |
| 1860 | return -ENOMEM; |
| 1861 | np->tx_ring = &np->rx_ring[RX_RING_SIZE]; |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | static void refill_rx(struct net_device *dev) |
| 1866 | { |
| 1867 | struct netdev_private *np = netdev_priv(dev); |
| 1868 | |
| 1869 | /* Refill the Rx ring buffers. */ |
| 1870 | for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) { |
| 1871 | struct sk_buff *skb; |
| 1872 | int entry = np->dirty_rx % RX_RING_SIZE; |
| 1873 | if (np->rx_skbuff[entry] == NULL) { |
| 1874 | unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING; |
| 1875 | skb = dev_alloc_skb(buflen); |
| 1876 | np->rx_skbuff[entry] = skb; |
| 1877 | if (skb == NULL) |
| 1878 | break; /* Better luck next round. */ |
| 1879 | skb->dev = dev; /* Mark as being used by this device. */ |
| 1880 | np->rx_dma[entry] = pci_map_single(np->pci_dev, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 1881 | skb->data, buflen, PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]); |
| 1883 | } |
| 1884 | np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz); |
| 1885 | } |
| 1886 | if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) { |
| 1887 | if (netif_msg_rx_err(np)) |
| 1888 | printk(KERN_WARNING "%s: going OOM.\n", dev->name); |
| 1889 | np->oom = 1; |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | static void set_bufsize(struct net_device *dev) |
| 1894 | { |
| 1895 | struct netdev_private *np = netdev_priv(dev); |
| 1896 | if (dev->mtu <= ETH_DATA_LEN) |
| 1897 | np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS; |
| 1898 | else |
| 1899 | np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS; |
| 1900 | } |
| 1901 | |
| 1902 | /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ |
| 1903 | static void init_ring(struct net_device *dev) |
| 1904 | { |
| 1905 | struct netdev_private *np = netdev_priv(dev); |
| 1906 | int i; |
| 1907 | |
| 1908 | /* 1) TX ring */ |
| 1909 | np->dirty_tx = np->cur_tx = 0; |
| 1910 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1911 | np->tx_skbuff[i] = NULL; |
| 1912 | np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma |
| 1913 | +sizeof(struct netdev_desc) |
| 1914 | *((i+1)%TX_RING_SIZE+RX_RING_SIZE)); |
| 1915 | np->tx_ring[i].cmd_status = 0; |
| 1916 | } |
| 1917 | |
| 1918 | /* 2) RX ring */ |
| 1919 | np->dirty_rx = 0; |
| 1920 | np->cur_rx = RX_RING_SIZE; |
| 1921 | np->oom = 0; |
| 1922 | set_bufsize(dev); |
| 1923 | |
| 1924 | np->rx_head_desc = &np->rx_ring[0]; |
| 1925 | |
| 1926 | /* Please be carefull before changing this loop - at least gcc-2.95.1 |
| 1927 | * miscompiles it otherwise. |
| 1928 | */ |
| 1929 | /* Initialize all Rx descriptors. */ |
| 1930 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1931 | np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma |
| 1932 | +sizeof(struct netdev_desc) |
| 1933 | *((i+1)%RX_RING_SIZE)); |
| 1934 | np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn); |
| 1935 | np->rx_skbuff[i] = NULL; |
| 1936 | } |
| 1937 | refill_rx(dev); |
| 1938 | dump_ring(dev); |
| 1939 | } |
| 1940 | |
| 1941 | static void drain_tx(struct net_device *dev) |
| 1942 | { |
| 1943 | struct netdev_private *np = netdev_priv(dev); |
| 1944 | int i; |
| 1945 | |
| 1946 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1947 | if (np->tx_skbuff[i]) { |
| 1948 | pci_unmap_single(np->pci_dev, |
| 1949 | np->tx_dma[i], np->tx_skbuff[i]->len, |
| 1950 | PCI_DMA_TODEVICE); |
| 1951 | dev_kfree_skb(np->tx_skbuff[i]); |
| 1952 | np->stats.tx_dropped++; |
| 1953 | } |
| 1954 | np->tx_skbuff[i] = NULL; |
| 1955 | } |
| 1956 | } |
| 1957 | |
| 1958 | static void drain_rx(struct net_device *dev) |
| 1959 | { |
| 1960 | struct netdev_private *np = netdev_priv(dev); |
| 1961 | unsigned int buflen = np->rx_buf_sz; |
| 1962 | int i; |
| 1963 | |
| 1964 | /* Free all the skbuffs in the Rx queue. */ |
| 1965 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1966 | np->rx_ring[i].cmd_status = 0; |
| 1967 | np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */ |
| 1968 | if (np->rx_skbuff[i]) { |
| 1969 | pci_unmap_single(np->pci_dev, |
| 1970 | np->rx_dma[i], buflen, |
| 1971 | PCI_DMA_FROMDEVICE); |
| 1972 | dev_kfree_skb(np->rx_skbuff[i]); |
| 1973 | } |
| 1974 | np->rx_skbuff[i] = NULL; |
| 1975 | } |
| 1976 | } |
| 1977 | |
| 1978 | static void drain_ring(struct net_device *dev) |
| 1979 | { |
| 1980 | drain_rx(dev); |
| 1981 | drain_tx(dev); |
| 1982 | } |
| 1983 | |
| 1984 | static void free_ring(struct net_device *dev) |
| 1985 | { |
| 1986 | struct netdev_private *np = netdev_priv(dev); |
| 1987 | pci_free_consistent(np->pci_dev, |
| 1988 | sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE), |
| 1989 | np->rx_ring, np->ring_dma); |
| 1990 | } |
| 1991 | |
| 1992 | static void reinit_rx(struct net_device *dev) |
| 1993 | { |
| 1994 | struct netdev_private *np = netdev_priv(dev); |
| 1995 | int i; |
| 1996 | |
| 1997 | /* RX Ring */ |
| 1998 | np->dirty_rx = 0; |
| 1999 | np->cur_rx = RX_RING_SIZE; |
| 2000 | np->rx_head_desc = &np->rx_ring[0]; |
| 2001 | /* Initialize all Rx descriptors. */ |
| 2002 | for (i = 0; i < RX_RING_SIZE; i++) |
| 2003 | np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn); |
| 2004 | |
| 2005 | refill_rx(dev); |
| 2006 | } |
| 2007 | |
| 2008 | static void reinit_ring(struct net_device *dev) |
| 2009 | { |
| 2010 | struct netdev_private *np = netdev_priv(dev); |
| 2011 | int i; |
| 2012 | |
| 2013 | /* drain TX ring */ |
| 2014 | drain_tx(dev); |
| 2015 | np->dirty_tx = np->cur_tx = 0; |
| 2016 | for (i=0;i<TX_RING_SIZE;i++) |
| 2017 | np->tx_ring[i].cmd_status = 0; |
| 2018 | |
| 2019 | reinit_rx(dev); |
| 2020 | } |
| 2021 | |
| 2022 | static int start_tx(struct sk_buff *skb, struct net_device *dev) |
| 2023 | { |
| 2024 | struct netdev_private *np = netdev_priv(dev); |
| 2025 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2026 | unsigned entry; |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2027 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2028 | |
| 2029 | /* Note: Ordering is important here, set the field with the |
| 2030 | "ownership" bit last, and only then increment cur_tx. */ |
| 2031 | |
| 2032 | /* Calculate the next Tx descriptor entry. */ |
| 2033 | entry = np->cur_tx % TX_RING_SIZE; |
| 2034 | |
| 2035 | np->tx_skbuff[entry] = skb; |
| 2036 | np->tx_dma[entry] = pci_map_single(np->pci_dev, |
| 2037 | skb->data,skb->len, PCI_DMA_TODEVICE); |
| 2038 | |
| 2039 | np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]); |
| 2040 | |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2041 | spin_lock_irqsave(&np->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | |
| 2043 | if (!np->hands_off) { |
| 2044 | np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len); |
| 2045 | /* StrongARM: Explicitly cache flush np->tx_ring and |
| 2046 | * skb->data,skb->len. */ |
| 2047 | wmb(); |
| 2048 | np->cur_tx++; |
| 2049 | if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) { |
| 2050 | netdev_tx_done(dev); |
| 2051 | if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) |
| 2052 | netif_stop_queue(dev); |
| 2053 | } |
| 2054 | /* Wake the potentially-idle transmit channel. */ |
| 2055 | writel(TxOn, ioaddr + ChipCmd); |
| 2056 | } else { |
| 2057 | dev_kfree_skb_irq(skb); |
| 2058 | np->stats.tx_dropped++; |
| 2059 | } |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2060 | spin_unlock_irqrestore(&np->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | |
| 2062 | dev->trans_start = jiffies; |
| 2063 | |
| 2064 | if (netif_msg_tx_queued(np)) { |
| 2065 | printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n", |
| 2066 | dev->name, np->cur_tx, entry); |
| 2067 | } |
| 2068 | return 0; |
| 2069 | } |
| 2070 | |
| 2071 | static void netdev_tx_done(struct net_device *dev) |
| 2072 | { |
| 2073 | struct netdev_private *np = netdev_priv(dev); |
| 2074 | |
| 2075 | for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) { |
| 2076 | int entry = np->dirty_tx % TX_RING_SIZE; |
| 2077 | if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn)) |
| 2078 | break; |
| 2079 | if (netif_msg_tx_done(np)) |
| 2080 | printk(KERN_DEBUG |
| 2081 | "%s: tx frame #%d finished, status %#08x.\n", |
| 2082 | dev->name, np->dirty_tx, |
| 2083 | le32_to_cpu(np->tx_ring[entry].cmd_status)); |
| 2084 | if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) { |
| 2085 | np->stats.tx_packets++; |
| 2086 | np->stats.tx_bytes += np->tx_skbuff[entry]->len; |
| 2087 | } else { /* Various Tx errors */ |
| 2088 | int tx_status = |
| 2089 | le32_to_cpu(np->tx_ring[entry].cmd_status); |
| 2090 | if (tx_status & (DescTxAbort|DescTxExcColl)) |
| 2091 | np->stats.tx_aborted_errors++; |
| 2092 | if (tx_status & DescTxFIFO) |
| 2093 | np->stats.tx_fifo_errors++; |
| 2094 | if (tx_status & DescTxCarrier) |
| 2095 | np->stats.tx_carrier_errors++; |
| 2096 | if (tx_status & DescTxOOWCol) |
| 2097 | np->stats.tx_window_errors++; |
| 2098 | np->stats.tx_errors++; |
| 2099 | } |
| 2100 | pci_unmap_single(np->pci_dev,np->tx_dma[entry], |
| 2101 | np->tx_skbuff[entry]->len, |
| 2102 | PCI_DMA_TODEVICE); |
| 2103 | /* Free the original skb. */ |
| 2104 | dev_kfree_skb_irq(np->tx_skbuff[entry]); |
| 2105 | np->tx_skbuff[entry] = NULL; |
| 2106 | } |
| 2107 | if (netif_queue_stopped(dev) |
| 2108 | && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) { |
| 2109 | /* The ring is no longer full, wake queue. */ |
| 2110 | netif_wake_queue(dev); |
| 2111 | } |
| 2112 | } |
| 2113 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2114 | /* The interrupt handler doesn't actually handle interrupts itself, it |
| 2115 | * schedules a NAPI poll if there is anything to do. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2116 | static irqreturn_t intr_handler(int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | { |
| 2118 | struct net_device *dev = dev_instance; |
| 2119 | struct netdev_private *np = netdev_priv(dev); |
| 2120 | void __iomem * ioaddr = ns_ioaddr(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | |
broonie@sirena.org.uk | 069f825 | 2007-03-14 19:49:14 +0000 | [diff] [blame] | 2122 | /* Reading IntrStatus automatically acknowledges so don't do |
| 2123 | * that while interrupts are disabled, (for example, while a |
| 2124 | * poll is scheduled). */ |
| 2125 | if (np->hands_off || !readl(ioaddr + IntrEnable)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | return IRQ_NONE; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2127 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2128 | np->intr_status = readl(ioaddr + IntrStatus); |
| 2129 | |
broonie@sirena.org.uk | 069f825 | 2007-03-14 19:49:14 +0000 | [diff] [blame] | 2130 | if (!np->intr_status) |
| 2131 | return IRQ_NONE; |
| 2132 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2133 | if (netif_msg_intr(np)) |
| 2134 | printk(KERN_DEBUG |
| 2135 | "%s: Interrupt, status %#08x, mask %#08x.\n", |
| 2136 | dev->name, np->intr_status, |
| 2137 | readl(ioaddr + IntrMask)); |
| 2138 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2139 | prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]); |
| 2140 | |
| 2141 | if (netif_rx_schedule_prep(dev)) { |
| 2142 | /* Disable interrupts and register for poll */ |
| 2143 | natsemi_irq_disable(dev); |
| 2144 | __netif_rx_schedule(dev); |
broonie@sirena.org.uk | 069f825 | 2007-03-14 19:49:14 +0000 | [diff] [blame] | 2145 | } else |
| 2146 | printk(KERN_WARNING |
| 2147 | "%s: Ignoring interrupt, status %#08x, mask %#08x.\n", |
| 2148 | dev->name, np->intr_status, |
| 2149 | readl(ioaddr + IntrMask)); |
| 2150 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2151 | return IRQ_HANDLED; |
| 2152 | } |
| 2153 | |
| 2154 | /* This is the NAPI poll routine. As well as the standard RX handling |
| 2155 | * it also handles all other interrupts that the chip might raise. |
| 2156 | */ |
| 2157 | static int natsemi_poll(struct net_device *dev, int *budget) |
| 2158 | { |
| 2159 | struct netdev_private *np = netdev_priv(dev); |
| 2160 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2161 | |
| 2162 | int work_to_do = min(*budget, dev->quota); |
| 2163 | int work_done = 0; |
| 2164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | do { |
broonie@sirena.org.uk | 069f825 | 2007-03-14 19:49:14 +0000 | [diff] [blame] | 2166 | if (netif_msg_intr(np)) |
| 2167 | printk(KERN_DEBUG |
| 2168 | "%s: Poll, status %#08x, mask %#08x.\n", |
| 2169 | dev->name, np->intr_status, |
| 2170 | readl(ioaddr + IntrMask)); |
| 2171 | |
broonie@sirena.org.uk | d2a9003 | 2007-03-14 19:49:15 +0000 | [diff] [blame^] | 2172 | /* netdev_rx() may read IntrStatus again if the RX state |
| 2173 | * machine falls over so do it first. */ |
| 2174 | if (np->intr_status & |
| 2175 | (IntrRxDone | IntrRxIntr | RxStatusFIFOOver | |
| 2176 | IntrRxErr | IntrRxOverrun)) { |
| 2177 | netdev_rx(dev, &work_done, work_to_do); |
| 2178 | } |
| 2179 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2180 | if (np->intr_status & |
| 2181 | (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | spin_lock(&np->lock); |
| 2183 | netdev_tx_done(dev); |
| 2184 | spin_unlock(&np->lock); |
| 2185 | } |
| 2186 | |
| 2187 | /* Abnormal error summary/uncommon events handlers. */ |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2188 | if (np->intr_status & IntrAbnormalSummary) |
| 2189 | netdev_error(dev, np->intr_status); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2190 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2191 | *budget -= work_done; |
| 2192 | dev->quota -= work_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2194 | if (work_done >= work_to_do) |
| 2195 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2197 | np->intr_status = readl(ioaddr + IntrStatus); |
| 2198 | } while (np->intr_status); |
| 2199 | |
| 2200 | netif_rx_complete(dev); |
| 2201 | |
| 2202 | /* Reenable interrupts providing nothing is trying to shut |
| 2203 | * the chip down. */ |
| 2204 | spin_lock(&np->lock); |
| 2205 | if (!np->hands_off && netif_running(dev)) |
| 2206 | natsemi_irq_enable(dev); |
| 2207 | spin_unlock(&np->lock); |
| 2208 | |
| 2209 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | /* This routine is logically part of the interrupt handler, but separated |
| 2213 | for clarity and better register allocation. */ |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2214 | static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | { |
| 2216 | struct netdev_private *np = netdev_priv(dev); |
| 2217 | int entry = np->cur_rx % RX_RING_SIZE; |
| 2218 | int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx; |
| 2219 | s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status); |
| 2220 | unsigned int buflen = np->rx_buf_sz; |
| 2221 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2222 | |
| 2223 | /* If the driver owns the next entry it's a new packet. Send it up. */ |
| 2224 | while (desc_status < 0) { /* e.g. & DescOwn */ |
| 2225 | int pkt_len; |
| 2226 | if (netif_msg_rx_status(np)) |
| 2227 | printk(KERN_DEBUG |
| 2228 | " netdev_rx() entry %d status was %#08x.\n", |
| 2229 | entry, desc_status); |
| 2230 | if (--boguscnt < 0) |
| 2231 | break; |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2232 | |
| 2233 | if (*work_done >= work_to_do) |
| 2234 | break; |
| 2235 | |
| 2236 | (*work_done)++; |
| 2237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | pkt_len = (desc_status & DescSizeMask) - 4; |
| 2239 | if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){ |
| 2240 | if (desc_status & DescMore) { |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2241 | unsigned long flags; |
| 2242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | if (netif_msg_rx_err(np)) |
| 2244 | printk(KERN_WARNING |
| 2245 | "%s: Oversized(?) Ethernet " |
| 2246 | "frame spanned multiple " |
| 2247 | "buffers, entry %#08x " |
| 2248 | "status %#08x.\n", dev->name, |
| 2249 | np->cur_rx, desc_status); |
| 2250 | np->stats.rx_length_errors++; |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 2251 | |
| 2252 | /* The RX state machine has probably |
| 2253 | * locked up beneath us. Follow the |
| 2254 | * reset procedure documented in |
| 2255 | * AN-1287. */ |
| 2256 | |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2257 | spin_lock_irqsave(&np->lock, flags); |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 2258 | reset_rx(dev); |
| 2259 | reinit_rx(dev); |
| 2260 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 2261 | check_link(dev); |
Sergei Shtylyov | 6006f7f | 2007-03-06 00:10:08 +0400 | [diff] [blame] | 2262 | spin_unlock_irqrestore(&np->lock, flags); |
Mark Brown | e72fd96 | 2006-02-02 00:00:02 +0000 | [diff] [blame] | 2263 | |
| 2264 | /* We'll enable RX on exit from this |
| 2265 | * function. */ |
| 2266 | break; |
| 2267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | } else { |
| 2269 | /* There was an error. */ |
| 2270 | np->stats.rx_errors++; |
| 2271 | if (desc_status & (DescRxAbort|DescRxOver)) |
| 2272 | np->stats.rx_over_errors++; |
| 2273 | if (desc_status & (DescRxLong|DescRxRunt)) |
| 2274 | np->stats.rx_length_errors++; |
| 2275 | if (desc_status & (DescRxInvalid|DescRxAlign)) |
| 2276 | np->stats.rx_frame_errors++; |
| 2277 | if (desc_status & DescRxCRC) |
| 2278 | np->stats.rx_crc_errors++; |
| 2279 | } |
| 2280 | } else if (pkt_len > np->rx_buf_sz) { |
| 2281 | /* if this is the tail of a double buffer |
| 2282 | * packet, we've already counted the error |
| 2283 | * on the first part. Ignore the second half. |
| 2284 | */ |
| 2285 | } else { |
| 2286 | struct sk_buff *skb; |
| 2287 | /* Omit CRC size. */ |
| 2288 | /* Check if the packet is long enough to accept |
| 2289 | * without copying to a minimally-sized skbuff. */ |
| 2290 | if (pkt_len < rx_copybreak |
| 2291 | && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) { |
| 2292 | skb->dev = dev; |
| 2293 | /* 16 byte align the IP header */ |
| 2294 | skb_reserve(skb, RX_OFFSET); |
| 2295 | pci_dma_sync_single_for_cpu(np->pci_dev, |
| 2296 | np->rx_dma[entry], |
| 2297 | buflen, |
| 2298 | PCI_DMA_FROMDEVICE); |
| 2299 | eth_copy_and_sum(skb, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 2300 | np->rx_skbuff[entry]->data, pkt_len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | skb_put(skb, pkt_len); |
| 2302 | pci_dma_sync_single_for_device(np->pci_dev, |
| 2303 | np->rx_dma[entry], |
| 2304 | buflen, |
| 2305 | PCI_DMA_FROMDEVICE); |
| 2306 | } else { |
| 2307 | pci_unmap_single(np->pci_dev, np->rx_dma[entry], |
| 2308 | buflen, PCI_DMA_FROMDEVICE); |
| 2309 | skb_put(skb = np->rx_skbuff[entry], pkt_len); |
| 2310 | np->rx_skbuff[entry] = NULL; |
| 2311 | } |
| 2312 | skb->protocol = eth_type_trans(skb, dev); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 2313 | netif_receive_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | dev->last_rx = jiffies; |
| 2315 | np->stats.rx_packets++; |
| 2316 | np->stats.rx_bytes += pkt_len; |
| 2317 | } |
| 2318 | entry = (++np->cur_rx) % RX_RING_SIZE; |
| 2319 | np->rx_head_desc = &np->rx_ring[entry]; |
| 2320 | desc_status = le32_to_cpu(np->rx_head_desc->cmd_status); |
| 2321 | } |
| 2322 | refill_rx(dev); |
| 2323 | |
| 2324 | /* Restart Rx engine if stopped. */ |
| 2325 | if (np->oom) |
| 2326 | mod_timer(&np->timer, jiffies + 1); |
| 2327 | else |
| 2328 | writel(RxOn, ioaddr + ChipCmd); |
| 2329 | } |
| 2330 | |
| 2331 | static void netdev_error(struct net_device *dev, int intr_status) |
| 2332 | { |
| 2333 | struct netdev_private *np = netdev_priv(dev); |
| 2334 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2335 | |
| 2336 | spin_lock(&np->lock); |
| 2337 | if (intr_status & LinkChange) { |
| 2338 | u16 lpa = mdio_read(dev, MII_LPA); |
| 2339 | if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE |
| 2340 | && netif_msg_link(np)) { |
| 2341 | printk(KERN_INFO |
| 2342 | "%s: Autonegotiation advertising" |
| 2343 | " %#04x partner %#04x.\n", dev->name, |
| 2344 | np->advertising, lpa); |
| 2345 | } |
| 2346 | |
| 2347 | /* read MII int status to clear the flag */ |
| 2348 | readw(ioaddr + MIntrStatus); |
| 2349 | check_link(dev); |
| 2350 | } |
| 2351 | if (intr_status & StatsMax) { |
| 2352 | __get_stats(dev); |
| 2353 | } |
| 2354 | if (intr_status & IntrTxUnderrun) { |
| 2355 | if ((np->tx_config & TxDrthMask) < TX_DRTH_VAL_LIMIT) { |
| 2356 | np->tx_config += TX_DRTH_VAL_INC; |
| 2357 | if (netif_msg_tx_err(np)) |
| 2358 | printk(KERN_NOTICE |
| 2359 | "%s: increased tx threshold, txcfg %#08x.\n", |
| 2360 | dev->name, np->tx_config); |
| 2361 | } else { |
| 2362 | if (netif_msg_tx_err(np)) |
| 2363 | printk(KERN_NOTICE |
| 2364 | "%s: tx underrun with maximum tx threshold, txcfg %#08x.\n", |
| 2365 | dev->name, np->tx_config); |
| 2366 | } |
| 2367 | writel(np->tx_config, ioaddr + TxConfig); |
| 2368 | } |
| 2369 | if (intr_status & WOLPkt && netif_msg_wol(np)) { |
| 2370 | int wol_status = readl(ioaddr + WOLCmd); |
| 2371 | printk(KERN_NOTICE "%s: Link wake-up event %#08x\n", |
| 2372 | dev->name, wol_status); |
| 2373 | } |
| 2374 | if (intr_status & RxStatusFIFOOver) { |
| 2375 | if (netif_msg_rx_err(np) && netif_msg_intr(np)) { |
| 2376 | printk(KERN_NOTICE "%s: Rx status FIFO overrun\n", |
| 2377 | dev->name); |
| 2378 | } |
| 2379 | np->stats.rx_fifo_errors++; |
| 2380 | } |
| 2381 | /* Hmmmmm, it's not clear how to recover from PCI faults. */ |
| 2382 | if (intr_status & IntrPCIErr) { |
| 2383 | printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name, |
| 2384 | intr_status & IntrPCIErr); |
| 2385 | np->stats.tx_fifo_errors++; |
| 2386 | np->stats.rx_fifo_errors++; |
| 2387 | } |
| 2388 | spin_unlock(&np->lock); |
| 2389 | } |
| 2390 | |
| 2391 | static void __get_stats(struct net_device *dev) |
| 2392 | { |
| 2393 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2394 | struct netdev_private *np = netdev_priv(dev); |
| 2395 | |
| 2396 | /* The chip only need report frame silently dropped. */ |
| 2397 | np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs); |
| 2398 | np->stats.rx_missed_errors += readl(ioaddr + RxMissed); |
| 2399 | } |
| 2400 | |
| 2401 | static struct net_device_stats *get_stats(struct net_device *dev) |
| 2402 | { |
| 2403 | struct netdev_private *np = netdev_priv(dev); |
| 2404 | |
| 2405 | /* The chip only need report frame silently dropped. */ |
| 2406 | spin_lock_irq(&np->lock); |
| 2407 | if (netif_running(dev) && !np->hands_off) |
| 2408 | __get_stats(dev); |
| 2409 | spin_unlock_irq(&np->lock); |
| 2410 | |
| 2411 | return &np->stats; |
| 2412 | } |
| 2413 | |
| 2414 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 2415 | static void natsemi_poll_controller(struct net_device *dev) |
| 2416 | { |
| 2417 | disable_irq(dev->irq); |
broonie@sirena.org.uk | 069f825 | 2007-03-14 19:49:14 +0000 | [diff] [blame] | 2418 | intr_handler(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | enable_irq(dev->irq); |
| 2420 | } |
| 2421 | #endif |
| 2422 | |
| 2423 | #define HASH_TABLE 0x200 |
| 2424 | static void __set_rx_mode(struct net_device *dev) |
| 2425 | { |
| 2426 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2427 | struct netdev_private *np = netdev_priv(dev); |
| 2428 | u8 mc_filter[64]; /* Multicast hash filter */ |
| 2429 | u32 rx_mode; |
| 2430 | |
| 2431 | if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2432 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2433 | | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys; |
| 2434 | } else if ((dev->mc_count > multicast_filter_limit) |
| 2435 | || (dev->flags & IFF_ALLMULTI)) { |
| 2436 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2437 | | AcceptAllMulticast | AcceptMyPhys; |
| 2438 | } else { |
| 2439 | struct dev_mc_list *mclist; |
| 2440 | int i; |
| 2441 | memset(mc_filter, 0, sizeof(mc_filter)); |
| 2442 | for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; |
| 2443 | i++, mclist = mclist->next) { |
| 2444 | int i = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff; |
| 2445 | mc_filter[i/8] |= (1 << (i & 0x07)); |
| 2446 | } |
| 2447 | rx_mode = RxFilterEnable | AcceptBroadcast |
| 2448 | | AcceptMulticast | AcceptMyPhys; |
| 2449 | for (i = 0; i < 64; i += 2) { |
Herbert Xu | 760f86d | 2005-04-16 16:24:16 +1000 | [diff] [blame] | 2450 | writel(HASH_TABLE + i, ioaddr + RxFilterAddr); |
| 2451 | writel((mc_filter[i + 1] << 8) + mc_filter[i], |
| 2452 | ioaddr + RxFilterData); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | } |
| 2454 | } |
| 2455 | writel(rx_mode, ioaddr + RxFilterAddr); |
| 2456 | np->cur_rx_mode = rx_mode; |
| 2457 | } |
| 2458 | |
| 2459 | static int natsemi_change_mtu(struct net_device *dev, int new_mtu) |
| 2460 | { |
| 2461 | if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS) |
| 2462 | return -EINVAL; |
| 2463 | |
| 2464 | dev->mtu = new_mtu; |
| 2465 | |
| 2466 | /* synchronized against open : rtnl_lock() held by caller */ |
| 2467 | if (netif_running(dev)) { |
| 2468 | struct netdev_private *np = netdev_priv(dev); |
| 2469 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2470 | |
| 2471 | disable_irq(dev->irq); |
| 2472 | spin_lock(&np->lock); |
| 2473 | /* stop engines */ |
| 2474 | natsemi_stop_rxtx(dev); |
| 2475 | /* drain rx queue */ |
| 2476 | drain_rx(dev); |
| 2477 | /* change buffers */ |
| 2478 | set_bufsize(dev); |
| 2479 | reinit_rx(dev); |
| 2480 | writel(np->ring_dma, ioaddr + RxRingPtr); |
| 2481 | /* restart engines */ |
| 2482 | writel(RxOn | TxOn, ioaddr + ChipCmd); |
| 2483 | spin_unlock(&np->lock); |
| 2484 | enable_irq(dev->irq); |
| 2485 | } |
| 2486 | return 0; |
| 2487 | } |
| 2488 | |
| 2489 | static void set_rx_mode(struct net_device *dev) |
| 2490 | { |
| 2491 | struct netdev_private *np = netdev_priv(dev); |
| 2492 | spin_lock_irq(&np->lock); |
| 2493 | if (!np->hands_off) |
| 2494 | __set_rx_mode(dev); |
| 2495 | spin_unlock_irq(&np->lock); |
| 2496 | } |
| 2497 | |
| 2498 | static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 2499 | { |
| 2500 | struct netdev_private *np = netdev_priv(dev); |
| 2501 | strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN); |
| 2502 | strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN); |
| 2503 | strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN); |
| 2504 | } |
| 2505 | |
| 2506 | static int get_regs_len(struct net_device *dev) |
| 2507 | { |
| 2508 | return NATSEMI_REGS_SIZE; |
| 2509 | } |
| 2510 | |
| 2511 | static int get_eeprom_len(struct net_device *dev) |
| 2512 | { |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2513 | struct netdev_private *np = netdev_priv(dev); |
| 2514 | return np->eeprom_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | } |
| 2516 | |
| 2517 | static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2518 | { |
| 2519 | struct netdev_private *np = netdev_priv(dev); |
| 2520 | spin_lock_irq(&np->lock); |
| 2521 | netdev_get_ecmd(dev, ecmd); |
| 2522 | spin_unlock_irq(&np->lock); |
| 2523 | return 0; |
| 2524 | } |
| 2525 | |
| 2526 | static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2527 | { |
| 2528 | struct netdev_private *np = netdev_priv(dev); |
| 2529 | int res; |
| 2530 | spin_lock_irq(&np->lock); |
| 2531 | res = netdev_set_ecmd(dev, ecmd); |
| 2532 | spin_unlock_irq(&np->lock); |
| 2533 | return res; |
| 2534 | } |
| 2535 | |
| 2536 | static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2537 | { |
| 2538 | struct netdev_private *np = netdev_priv(dev); |
| 2539 | spin_lock_irq(&np->lock); |
| 2540 | netdev_get_wol(dev, &wol->supported, &wol->wolopts); |
| 2541 | netdev_get_sopass(dev, wol->sopass); |
| 2542 | spin_unlock_irq(&np->lock); |
| 2543 | } |
| 2544 | |
| 2545 | static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2546 | { |
| 2547 | struct netdev_private *np = netdev_priv(dev); |
| 2548 | int res; |
| 2549 | spin_lock_irq(&np->lock); |
| 2550 | netdev_set_wol(dev, wol->wolopts); |
| 2551 | res = netdev_set_sopass(dev, wol->sopass); |
| 2552 | spin_unlock_irq(&np->lock); |
| 2553 | return res; |
| 2554 | } |
| 2555 | |
| 2556 | static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf) |
| 2557 | { |
| 2558 | struct netdev_private *np = netdev_priv(dev); |
| 2559 | regs->version = NATSEMI_REGS_VER; |
| 2560 | spin_lock_irq(&np->lock); |
| 2561 | netdev_get_regs(dev, buf); |
| 2562 | spin_unlock_irq(&np->lock); |
| 2563 | } |
| 2564 | |
| 2565 | static u32 get_msglevel(struct net_device *dev) |
| 2566 | { |
| 2567 | struct netdev_private *np = netdev_priv(dev); |
| 2568 | return np->msg_enable; |
| 2569 | } |
| 2570 | |
| 2571 | static void set_msglevel(struct net_device *dev, u32 val) |
| 2572 | { |
| 2573 | struct netdev_private *np = netdev_priv(dev); |
| 2574 | np->msg_enable = val; |
| 2575 | } |
| 2576 | |
| 2577 | static int nway_reset(struct net_device *dev) |
| 2578 | { |
| 2579 | int tmp; |
| 2580 | int r = -EINVAL; |
| 2581 | /* if autoneg is off, it's an error */ |
| 2582 | tmp = mdio_read(dev, MII_BMCR); |
| 2583 | if (tmp & BMCR_ANENABLE) { |
| 2584 | tmp |= (BMCR_ANRESTART); |
| 2585 | mdio_write(dev, MII_BMCR, tmp); |
| 2586 | r = 0; |
| 2587 | } |
| 2588 | return r; |
| 2589 | } |
| 2590 | |
| 2591 | static u32 get_link(struct net_device *dev) |
| 2592 | { |
| 2593 | /* LSTATUS is latched low until a read - so read twice */ |
| 2594 | mdio_read(dev, MII_BMSR); |
| 2595 | return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0; |
| 2596 | } |
| 2597 | |
| 2598 | static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data) |
| 2599 | { |
| 2600 | struct netdev_private *np = netdev_priv(dev); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2601 | u8 *eebuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2602 | int res; |
| 2603 | |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2604 | eebuf = kmalloc(np->eeprom_size, GFP_KERNEL); |
| 2605 | if (!eebuf) |
| 2606 | return -ENOMEM; |
| 2607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16); |
| 2609 | spin_lock_irq(&np->lock); |
| 2610 | res = netdev_get_eeprom(dev, eebuf); |
| 2611 | spin_unlock_irq(&np->lock); |
| 2612 | if (!res) |
| 2613 | memcpy(data, eebuf+eeprom->offset, eeprom->len); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2614 | kfree(eebuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | return res; |
| 2616 | } |
| 2617 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 2618 | static const struct ethtool_ops ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | .get_drvinfo = get_drvinfo, |
| 2620 | .get_regs_len = get_regs_len, |
| 2621 | .get_eeprom_len = get_eeprom_len, |
| 2622 | .get_settings = get_settings, |
| 2623 | .set_settings = set_settings, |
| 2624 | .get_wol = get_wol, |
| 2625 | .set_wol = set_wol, |
| 2626 | .get_regs = get_regs, |
| 2627 | .get_msglevel = get_msglevel, |
| 2628 | .set_msglevel = set_msglevel, |
| 2629 | .nway_reset = nway_reset, |
| 2630 | .get_link = get_link, |
| 2631 | .get_eeprom = get_eeprom, |
| 2632 | }; |
| 2633 | |
| 2634 | static int netdev_set_wol(struct net_device *dev, u32 newval) |
| 2635 | { |
| 2636 | struct netdev_private *np = netdev_priv(dev); |
| 2637 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2638 | u32 data = readl(ioaddr + WOLCmd) & ~WakeOptsSummary; |
| 2639 | |
| 2640 | /* translate to bitmasks this chip understands */ |
| 2641 | if (newval & WAKE_PHY) |
| 2642 | data |= WakePhy; |
| 2643 | if (newval & WAKE_UCAST) |
| 2644 | data |= WakeUnicast; |
| 2645 | if (newval & WAKE_MCAST) |
| 2646 | data |= WakeMulticast; |
| 2647 | if (newval & WAKE_BCAST) |
| 2648 | data |= WakeBroadcast; |
| 2649 | if (newval & WAKE_ARP) |
| 2650 | data |= WakeArp; |
| 2651 | if (newval & WAKE_MAGIC) |
| 2652 | data |= WakeMagic; |
| 2653 | if (np->srr >= SRR_DP83815_D) { |
| 2654 | if (newval & WAKE_MAGICSECURE) { |
| 2655 | data |= WakeMagicSecure; |
| 2656 | } |
| 2657 | } |
| 2658 | |
| 2659 | writel(data, ioaddr + WOLCmd); |
| 2660 | |
| 2661 | return 0; |
| 2662 | } |
| 2663 | |
| 2664 | static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur) |
| 2665 | { |
| 2666 | struct netdev_private *np = netdev_priv(dev); |
| 2667 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2668 | u32 regval = readl(ioaddr + WOLCmd); |
| 2669 | |
| 2670 | *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST |
| 2671 | | WAKE_ARP | WAKE_MAGIC); |
| 2672 | |
| 2673 | if (np->srr >= SRR_DP83815_D) { |
| 2674 | /* SOPASS works on revD and higher */ |
| 2675 | *supported |= WAKE_MAGICSECURE; |
| 2676 | } |
| 2677 | *cur = 0; |
| 2678 | |
| 2679 | /* translate from chip bitmasks */ |
| 2680 | if (regval & WakePhy) |
| 2681 | *cur |= WAKE_PHY; |
| 2682 | if (regval & WakeUnicast) |
| 2683 | *cur |= WAKE_UCAST; |
| 2684 | if (regval & WakeMulticast) |
| 2685 | *cur |= WAKE_MCAST; |
| 2686 | if (regval & WakeBroadcast) |
| 2687 | *cur |= WAKE_BCAST; |
| 2688 | if (regval & WakeArp) |
| 2689 | *cur |= WAKE_ARP; |
| 2690 | if (regval & WakeMagic) |
| 2691 | *cur |= WAKE_MAGIC; |
| 2692 | if (regval & WakeMagicSecure) { |
| 2693 | /* this can be on in revC, but it's broken */ |
| 2694 | *cur |= WAKE_MAGICSECURE; |
| 2695 | } |
| 2696 | |
| 2697 | return 0; |
| 2698 | } |
| 2699 | |
| 2700 | static int netdev_set_sopass(struct net_device *dev, u8 *newval) |
| 2701 | { |
| 2702 | struct netdev_private *np = netdev_priv(dev); |
| 2703 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2704 | u16 *sval = (u16 *)newval; |
| 2705 | u32 addr; |
| 2706 | |
| 2707 | if (np->srr < SRR_DP83815_D) { |
| 2708 | return 0; |
| 2709 | } |
| 2710 | |
| 2711 | /* enable writing to these registers by disabling the RX filter */ |
| 2712 | addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask; |
| 2713 | addr &= ~RxFilterEnable; |
| 2714 | writel(addr, ioaddr + RxFilterAddr); |
| 2715 | |
| 2716 | /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */ |
| 2717 | writel(addr | 0xa, ioaddr + RxFilterAddr); |
| 2718 | writew(sval[0], ioaddr + RxFilterData); |
| 2719 | |
| 2720 | writel(addr | 0xc, ioaddr + RxFilterAddr); |
| 2721 | writew(sval[1], ioaddr + RxFilterData); |
| 2722 | |
| 2723 | writel(addr | 0xe, ioaddr + RxFilterAddr); |
| 2724 | writew(sval[2], ioaddr + RxFilterData); |
| 2725 | |
| 2726 | /* re-enable the RX filter */ |
| 2727 | writel(addr | RxFilterEnable, ioaddr + RxFilterAddr); |
| 2728 | |
| 2729 | return 0; |
| 2730 | } |
| 2731 | |
| 2732 | static int netdev_get_sopass(struct net_device *dev, u8 *data) |
| 2733 | { |
| 2734 | struct netdev_private *np = netdev_priv(dev); |
| 2735 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2736 | u16 *sval = (u16 *)data; |
| 2737 | u32 addr; |
| 2738 | |
| 2739 | if (np->srr < SRR_DP83815_D) { |
| 2740 | sval[0] = sval[1] = sval[2] = 0; |
| 2741 | return 0; |
| 2742 | } |
| 2743 | |
| 2744 | /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */ |
| 2745 | addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask; |
| 2746 | |
| 2747 | writel(addr | 0xa, ioaddr + RxFilterAddr); |
| 2748 | sval[0] = readw(ioaddr + RxFilterData); |
| 2749 | |
| 2750 | writel(addr | 0xc, ioaddr + RxFilterAddr); |
| 2751 | sval[1] = readw(ioaddr + RxFilterData); |
| 2752 | |
| 2753 | writel(addr | 0xe, ioaddr + RxFilterAddr); |
| 2754 | sval[2] = readw(ioaddr + RxFilterData); |
| 2755 | |
| 2756 | writel(addr, ioaddr + RxFilterAddr); |
| 2757 | |
| 2758 | return 0; |
| 2759 | } |
| 2760 | |
| 2761 | static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2762 | { |
| 2763 | struct netdev_private *np = netdev_priv(dev); |
| 2764 | u32 tmp; |
| 2765 | |
| 2766 | ecmd->port = dev->if_port; |
| 2767 | ecmd->speed = np->speed; |
| 2768 | ecmd->duplex = np->duplex; |
| 2769 | ecmd->autoneg = np->autoneg; |
| 2770 | ecmd->advertising = 0; |
| 2771 | if (np->advertising & ADVERTISE_10HALF) |
| 2772 | ecmd->advertising |= ADVERTISED_10baseT_Half; |
| 2773 | if (np->advertising & ADVERTISE_10FULL) |
| 2774 | ecmd->advertising |= ADVERTISED_10baseT_Full; |
| 2775 | if (np->advertising & ADVERTISE_100HALF) |
| 2776 | ecmd->advertising |= ADVERTISED_100baseT_Half; |
| 2777 | if (np->advertising & ADVERTISE_100FULL) |
| 2778 | ecmd->advertising |= ADVERTISED_100baseT_Full; |
| 2779 | ecmd->supported = (SUPPORTED_Autoneg | |
| 2780 | SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | |
| 2781 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | |
| 2782 | SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE); |
| 2783 | ecmd->phy_address = np->phy_addr_external; |
| 2784 | /* |
| 2785 | * We intentionally report the phy address of the external |
| 2786 | * phy, even if the internal phy is used. This is necessary |
| 2787 | * to work around a deficiency of the ethtool interface: |
| 2788 | * It's only possible to query the settings of the active |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2789 | * port. Therefore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2790 | * # ethtool -s ethX port mii |
| 2791 | * actually sends an ioctl to switch to port mii with the |
| 2792 | * settings that are used for the current active port. |
| 2793 | * If we would report a different phy address in this |
| 2794 | * command, then |
| 2795 | * # ethtool -s ethX port tp;ethtool -s ethX port mii |
| 2796 | * would unintentionally change the phy address. |
| 2797 | * |
| 2798 | * Fortunately the phy address doesn't matter with the |
| 2799 | * internal phy... |
| 2800 | */ |
| 2801 | |
| 2802 | /* set information based on active port type */ |
| 2803 | switch (ecmd->port) { |
| 2804 | default: |
| 2805 | case PORT_TP: |
| 2806 | ecmd->advertising |= ADVERTISED_TP; |
| 2807 | ecmd->transceiver = XCVR_INTERNAL; |
| 2808 | break; |
| 2809 | case PORT_MII: |
| 2810 | ecmd->advertising |= ADVERTISED_MII; |
| 2811 | ecmd->transceiver = XCVR_EXTERNAL; |
| 2812 | break; |
| 2813 | case PORT_FIBRE: |
| 2814 | ecmd->advertising |= ADVERTISED_FIBRE; |
| 2815 | ecmd->transceiver = XCVR_EXTERNAL; |
| 2816 | break; |
| 2817 | } |
| 2818 | |
| 2819 | /* if autonegotiation is on, try to return the active speed/duplex */ |
| 2820 | if (ecmd->autoneg == AUTONEG_ENABLE) { |
| 2821 | ecmd->advertising |= ADVERTISED_Autoneg; |
| 2822 | tmp = mii_nway_result( |
| 2823 | np->advertising & mdio_read(dev, MII_LPA)); |
| 2824 | if (tmp == LPA_100FULL || tmp == LPA_100HALF) |
| 2825 | ecmd->speed = SPEED_100; |
| 2826 | else |
| 2827 | ecmd->speed = SPEED_10; |
| 2828 | if (tmp == LPA_100FULL || tmp == LPA_10FULL) |
| 2829 | ecmd->duplex = DUPLEX_FULL; |
| 2830 | else |
| 2831 | ecmd->duplex = DUPLEX_HALF; |
| 2832 | } |
| 2833 | |
| 2834 | /* ignore maxtxpkt, maxrxpkt for now */ |
| 2835 | |
| 2836 | return 0; |
| 2837 | } |
| 2838 | |
| 2839 | static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd) |
| 2840 | { |
| 2841 | struct netdev_private *np = netdev_priv(dev); |
| 2842 | |
| 2843 | if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE) |
| 2844 | return -EINVAL; |
| 2845 | if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL) |
| 2846 | return -EINVAL; |
| 2847 | if (ecmd->autoneg == AUTONEG_ENABLE) { |
| 2848 | if ((ecmd->advertising & (ADVERTISED_10baseT_Half | |
| 2849 | ADVERTISED_10baseT_Full | |
| 2850 | ADVERTISED_100baseT_Half | |
| 2851 | ADVERTISED_100baseT_Full)) == 0) { |
| 2852 | return -EINVAL; |
| 2853 | } |
| 2854 | } else if (ecmd->autoneg == AUTONEG_DISABLE) { |
| 2855 | if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100) |
| 2856 | return -EINVAL; |
| 2857 | if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL) |
| 2858 | return -EINVAL; |
| 2859 | } else { |
| 2860 | return -EINVAL; |
| 2861 | } |
| 2862 | |
| 2863 | /* |
Mark Brown | 68c9016 | 2007-02-19 20:15:39 +0000 | [diff] [blame] | 2864 | * If we're ignoring the PHY then autoneg and the internal |
| 2865 | * transciever are really not going to work so don't let the |
| 2866 | * user select them. |
| 2867 | */ |
| 2868 | if (np->ignore_phy && (ecmd->autoneg == AUTONEG_ENABLE || |
| 2869 | ecmd->port == PORT_TP)) |
| 2870 | return -EINVAL; |
| 2871 | |
| 2872 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | * maxtxpkt, maxrxpkt: ignored for now. |
| 2874 | * |
| 2875 | * transceiver: |
| 2876 | * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always |
| 2877 | * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and |
| 2878 | * selects based on ecmd->port. |
| 2879 | * |
| 2880 | * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre |
| 2881 | * phys that are connected to the mii bus. It's used to apply fibre |
| 2882 | * specific updates. |
| 2883 | */ |
| 2884 | |
| 2885 | /* WHEW! now lets bang some bits */ |
| 2886 | |
| 2887 | /* save the parms */ |
| 2888 | dev->if_port = ecmd->port; |
| 2889 | np->autoneg = ecmd->autoneg; |
| 2890 | np->phy_addr_external = ecmd->phy_address & PhyAddrMask; |
| 2891 | if (np->autoneg == AUTONEG_ENABLE) { |
| 2892 | /* advertise only what has been requested */ |
| 2893 | np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4); |
| 2894 | if (ecmd->advertising & ADVERTISED_10baseT_Half) |
| 2895 | np->advertising |= ADVERTISE_10HALF; |
| 2896 | if (ecmd->advertising & ADVERTISED_10baseT_Full) |
| 2897 | np->advertising |= ADVERTISE_10FULL; |
| 2898 | if (ecmd->advertising & ADVERTISED_100baseT_Half) |
| 2899 | np->advertising |= ADVERTISE_100HALF; |
| 2900 | if (ecmd->advertising & ADVERTISED_100baseT_Full) |
| 2901 | np->advertising |= ADVERTISE_100FULL; |
| 2902 | } else { |
| 2903 | np->speed = ecmd->speed; |
| 2904 | np->duplex = ecmd->duplex; |
| 2905 | /* user overriding the initial full duplex parm? */ |
| 2906 | if (np->duplex == DUPLEX_HALF) |
| 2907 | np->full_duplex = 0; |
| 2908 | } |
| 2909 | |
| 2910 | /* get the right phy enabled */ |
| 2911 | if (ecmd->port == PORT_TP) |
| 2912 | switch_port_internal(dev); |
| 2913 | else |
| 2914 | switch_port_external(dev); |
| 2915 | |
| 2916 | /* set parms and see how this affected our link status */ |
| 2917 | init_phy_fixup(dev); |
| 2918 | check_link(dev); |
| 2919 | return 0; |
| 2920 | } |
| 2921 | |
| 2922 | static int netdev_get_regs(struct net_device *dev, u8 *buf) |
| 2923 | { |
| 2924 | int i; |
| 2925 | int j; |
| 2926 | u32 rfcr; |
| 2927 | u32 *rbuf = (u32 *)buf; |
| 2928 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 2929 | |
| 2930 | /* read non-mii page 0 of registers */ |
| 2931 | for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) { |
| 2932 | rbuf[i] = readl(ioaddr + i*4); |
| 2933 | } |
| 2934 | |
| 2935 | /* read current mii registers */ |
| 2936 | for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++) |
| 2937 | rbuf[i] = mdio_read(dev, i & 0x1f); |
| 2938 | |
| 2939 | /* read only the 'magic' registers from page 1 */ |
| 2940 | writew(1, ioaddr + PGSEL); |
| 2941 | rbuf[i++] = readw(ioaddr + PMDCSR); |
| 2942 | rbuf[i++] = readw(ioaddr + TSTDAT); |
| 2943 | rbuf[i++] = readw(ioaddr + DSPCFG); |
| 2944 | rbuf[i++] = readw(ioaddr + SDCFG); |
| 2945 | writew(0, ioaddr + PGSEL); |
| 2946 | |
| 2947 | /* read RFCR indexed registers */ |
| 2948 | rfcr = readl(ioaddr + RxFilterAddr); |
| 2949 | for (j = 0; j < NATSEMI_RFDR_NREGS; j++) { |
| 2950 | writel(j*2, ioaddr + RxFilterAddr); |
| 2951 | rbuf[i++] = readw(ioaddr + RxFilterData); |
| 2952 | } |
| 2953 | writel(rfcr, ioaddr + RxFilterAddr); |
| 2954 | |
| 2955 | /* the interrupt status is clear-on-read - see if we missed any */ |
| 2956 | if (rbuf[4] & rbuf[5]) { |
| 2957 | printk(KERN_WARNING |
| 2958 | "%s: shoot, we dropped an interrupt (%#08x)\n", |
| 2959 | dev->name, rbuf[4] & rbuf[5]); |
| 2960 | } |
| 2961 | |
| 2962 | return 0; |
| 2963 | } |
| 2964 | |
| 2965 | #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \ |
| 2966 | | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \ |
| 2967 | | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \ |
| 2968 | | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \ |
| 2969 | | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \ |
| 2970 | | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \ |
| 2971 | | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \ |
| 2972 | | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) ) |
| 2973 | |
| 2974 | static int netdev_get_eeprom(struct net_device *dev, u8 *buf) |
| 2975 | { |
| 2976 | int i; |
| 2977 | u16 *ebuf = (u16 *)buf; |
| 2978 | void __iomem * ioaddr = ns_ioaddr(dev); |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2979 | struct netdev_private *np = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2980 | |
| 2981 | /* eeprom_read reads 16 bits, and indexes by 16 bits */ |
Mark Brown | a8b4cf4 | 2006-03-28 14:08:55 -0800 | [diff] [blame] | 2982 | for (i = 0; i < np->eeprom_size/2; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | ebuf[i] = eeprom_read(ioaddr, i); |
| 2984 | /* The EEPROM itself stores data bit-swapped, but eeprom_read |
| 2985 | * reads it back "sanely". So we swap it back here in order to |
| 2986 | * present it to userland as it is stored. */ |
| 2987 | ebuf[i] = SWAP_BITS(ebuf[i]); |
| 2988 | } |
| 2989 | return 0; |
| 2990 | } |
| 2991 | |
| 2992 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 2993 | { |
| 2994 | struct mii_ioctl_data *data = if_mii(rq); |
| 2995 | struct netdev_private *np = netdev_priv(dev); |
| 2996 | |
| 2997 | switch(cmd) { |
| 2998 | case SIOCGMIIPHY: /* Get address of MII PHY in use. */ |
| 2999 | case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */ |
| 3000 | data->phy_id = np->phy_addr_external; |
| 3001 | /* Fall Through */ |
| 3002 | |
| 3003 | case SIOCGMIIREG: /* Read MII PHY register. */ |
| 3004 | case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */ |
| 3005 | /* The phy_id is not enough to uniquely identify |
| 3006 | * the intended target. Therefore the command is sent to |
| 3007 | * the given mii on the current port. |
| 3008 | */ |
| 3009 | if (dev->if_port == PORT_TP) { |
| 3010 | if ((data->phy_id & 0x1f) == np->phy_addr_external) |
| 3011 | data->val_out = mdio_read(dev, |
| 3012 | data->reg_num & 0x1f); |
| 3013 | else |
| 3014 | data->val_out = 0; |
| 3015 | } else { |
| 3016 | move_int_phy(dev, data->phy_id & 0x1f); |
| 3017 | data->val_out = miiport_read(dev, data->phy_id & 0x1f, |
| 3018 | data->reg_num & 0x1f); |
| 3019 | } |
| 3020 | return 0; |
| 3021 | |
| 3022 | case SIOCSMIIREG: /* Write MII PHY register. */ |
| 3023 | case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */ |
| 3024 | if (!capable(CAP_NET_ADMIN)) |
| 3025 | return -EPERM; |
| 3026 | if (dev->if_port == PORT_TP) { |
| 3027 | if ((data->phy_id & 0x1f) == np->phy_addr_external) { |
| 3028 | if ((data->reg_num & 0x1f) == MII_ADVERTISE) |
| 3029 | np->advertising = data->val_in; |
| 3030 | mdio_write(dev, data->reg_num & 0x1f, |
| 3031 | data->val_in); |
| 3032 | } |
| 3033 | } else { |
| 3034 | if ((data->phy_id & 0x1f) == np->phy_addr_external) { |
| 3035 | if ((data->reg_num & 0x1f) == MII_ADVERTISE) |
| 3036 | np->advertising = data->val_in; |
| 3037 | } |
| 3038 | move_int_phy(dev, data->phy_id & 0x1f); |
| 3039 | miiport_write(dev, data->phy_id & 0x1f, |
| 3040 | data->reg_num & 0x1f, |
| 3041 | data->val_in); |
| 3042 | } |
| 3043 | return 0; |
| 3044 | default: |
| 3045 | return -EOPNOTSUPP; |
| 3046 | } |
| 3047 | } |
| 3048 | |
| 3049 | static void enable_wol_mode(struct net_device *dev, int enable_intr) |
| 3050 | { |
| 3051 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3052 | struct netdev_private *np = netdev_priv(dev); |
| 3053 | |
| 3054 | if (netif_msg_wol(np)) |
| 3055 | printk(KERN_INFO "%s: remaining active for wake-on-lan\n", |
| 3056 | dev->name); |
| 3057 | |
| 3058 | /* For WOL we must restart the rx process in silent mode. |
| 3059 | * Write NULL to the RxRingPtr. Only possible if |
| 3060 | * rx process is stopped |
| 3061 | */ |
| 3062 | writel(0, ioaddr + RxRingPtr); |
| 3063 | |
| 3064 | /* read WoL status to clear */ |
| 3065 | readl(ioaddr + WOLCmd); |
| 3066 | |
| 3067 | /* PME on, clear status */ |
| 3068 | writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun); |
| 3069 | |
| 3070 | /* and restart the rx process */ |
| 3071 | writel(RxOn, ioaddr + ChipCmd); |
| 3072 | |
| 3073 | if (enable_intr) { |
| 3074 | /* enable the WOL interrupt. |
| 3075 | * Could be used to send a netlink message. |
| 3076 | */ |
| 3077 | writel(WOLPkt | LinkChange, ioaddr + IntrMask); |
broonie@sirena.org.uk | 14fdd90 | 2007-03-14 19:49:13 +0000 | [diff] [blame] | 3078 | natsemi_irq_enable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | } |
| 3080 | } |
| 3081 | |
| 3082 | static int netdev_close(struct net_device *dev) |
| 3083 | { |
| 3084 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3085 | struct netdev_private *np = netdev_priv(dev); |
| 3086 | |
| 3087 | if (netif_msg_ifdown(np)) |
| 3088 | printk(KERN_DEBUG |
| 3089 | "%s: Shutting down ethercard, status was %#04x.\n", |
| 3090 | dev->name, (int)readl(ioaddr + ChipCmd)); |
| 3091 | if (netif_msg_pktdata(np)) |
| 3092 | printk(KERN_DEBUG |
| 3093 | "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", |
| 3094 | dev->name, np->cur_tx, np->dirty_tx, |
| 3095 | np->cur_rx, np->dirty_rx); |
| 3096 | |
| 3097 | /* |
| 3098 | * FIXME: what if someone tries to close a device |
| 3099 | * that is suspended? |
| 3100 | * Should we reenable the nic to switch to |
| 3101 | * the final WOL settings? |
| 3102 | */ |
| 3103 | |
| 3104 | del_timer_sync(&np->timer); |
| 3105 | disable_irq(dev->irq); |
| 3106 | spin_lock_irq(&np->lock); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3107 | natsemi_irq_disable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3108 | np->hands_off = 1; |
| 3109 | spin_unlock_irq(&np->lock); |
| 3110 | enable_irq(dev->irq); |
| 3111 | |
| 3112 | free_irq(dev->irq, dev); |
| 3113 | |
| 3114 | /* Interrupt disabled, interrupt handler released, |
| 3115 | * queue stopped, timer deleted, rtnl_lock held |
| 3116 | * All async codepaths that access the driver are disabled. |
| 3117 | */ |
| 3118 | spin_lock_irq(&np->lock); |
| 3119 | np->hands_off = 0; |
| 3120 | readl(ioaddr + IntrMask); |
| 3121 | readw(ioaddr + MIntrStatus); |
| 3122 | |
| 3123 | /* Freeze Stats */ |
| 3124 | writel(StatsFreeze, ioaddr + StatsCtrl); |
| 3125 | |
| 3126 | /* Stop the chip's Tx and Rx processes. */ |
| 3127 | natsemi_stop_rxtx(dev); |
| 3128 | |
| 3129 | __get_stats(dev); |
| 3130 | spin_unlock_irq(&np->lock); |
| 3131 | |
| 3132 | /* clear the carrier last - an interrupt could reenable it otherwise */ |
| 3133 | netif_carrier_off(dev); |
| 3134 | netif_stop_queue(dev); |
| 3135 | |
| 3136 | dump_ring(dev); |
| 3137 | drain_ring(dev); |
| 3138 | free_ring(dev); |
| 3139 | |
| 3140 | { |
| 3141 | u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary; |
| 3142 | if (wol) { |
| 3143 | /* restart the NIC in WOL mode. |
| 3144 | * The nic must be stopped for this. |
| 3145 | */ |
| 3146 | enable_wol_mode(dev, 0); |
| 3147 | } else { |
| 3148 | /* Restore PME enable bit unmolested */ |
| 3149 | writel(np->SavedClkRun, ioaddr + ClkRun); |
| 3150 | } |
| 3151 | } |
| 3152 | return 0; |
| 3153 | } |
| 3154 | |
| 3155 | |
| 3156 | static void __devexit natsemi_remove1 (struct pci_dev *pdev) |
| 3157 | { |
| 3158 | struct net_device *dev = pci_get_drvdata(pdev); |
| 3159 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3160 | |
| 3161 | unregister_netdev (dev); |
| 3162 | pci_release_regions (pdev); |
| 3163 | iounmap(ioaddr); |
| 3164 | free_netdev (dev); |
| 3165 | pci_set_drvdata(pdev, NULL); |
| 3166 | } |
| 3167 | |
| 3168 | #ifdef CONFIG_PM |
| 3169 | |
| 3170 | /* |
| 3171 | * The ns83815 chip doesn't have explicit RxStop bits. |
| 3172 | * Kicking the Rx or Tx process for a new packet reenables the Rx process |
| 3173 | * of the nic, thus this function must be very careful: |
| 3174 | * |
| 3175 | * suspend/resume synchronization: |
| 3176 | * entry points: |
| 3177 | * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler, |
| 3178 | * start_tx, tx_timeout |
| 3179 | * |
| 3180 | * No function accesses the hardware without checking np->hands_off. |
| 3181 | * the check occurs under spin_lock_irq(&np->lock); |
| 3182 | * exceptions: |
| 3183 | * * netdev_ioctl: noncritical access. |
| 3184 | * * netdev_open: cannot happen due to the device_detach |
| 3185 | * * netdev_close: doesn't hurt. |
| 3186 | * * netdev_timer: timer stopped by natsemi_suspend. |
| 3187 | * * intr_handler: doesn't acquire the spinlock. suspend calls |
| 3188 | * disable_irq() to enforce synchronization. |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3189 | * * natsemi_poll: checks before reenabling interrupts. suspend |
| 3190 | * sets hands_off, disables interrupts and then waits with |
| 3191 | * netif_poll_disable(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3192 | * |
| 3193 | * Interrupts must be disabled, otherwise hands_off can cause irq storms. |
| 3194 | */ |
| 3195 | |
| 3196 | static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state) |
| 3197 | { |
| 3198 | struct net_device *dev = pci_get_drvdata (pdev); |
| 3199 | struct netdev_private *np = netdev_priv(dev); |
| 3200 | void __iomem * ioaddr = ns_ioaddr(dev); |
| 3201 | |
| 3202 | rtnl_lock(); |
| 3203 | if (netif_running (dev)) { |
| 3204 | del_timer_sync(&np->timer); |
| 3205 | |
| 3206 | disable_irq(dev->irq); |
| 3207 | spin_lock_irq(&np->lock); |
| 3208 | |
broonie@sirena.org.uk | 14fdd90 | 2007-03-14 19:49:13 +0000 | [diff] [blame] | 3209 | natsemi_irq_disable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3210 | np->hands_off = 1; |
| 3211 | natsemi_stop_rxtx(dev); |
| 3212 | netif_stop_queue(dev); |
| 3213 | |
| 3214 | spin_unlock_irq(&np->lock); |
| 3215 | enable_irq(dev->irq); |
| 3216 | |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3217 | netif_poll_disable(dev); |
| 3218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | /* Update the error counts. */ |
| 3220 | __get_stats(dev); |
| 3221 | |
| 3222 | /* pci_power_off(pdev, -1); */ |
| 3223 | drain_ring(dev); |
| 3224 | { |
| 3225 | u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary; |
| 3226 | /* Restore PME enable bit */ |
| 3227 | if (wol) { |
| 3228 | /* restart the NIC in WOL mode. |
| 3229 | * The nic must be stopped for this. |
| 3230 | * FIXME: use the WOL interrupt |
| 3231 | */ |
| 3232 | enable_wol_mode(dev, 0); |
| 3233 | } else { |
| 3234 | /* Restore PME enable bit unmolested */ |
| 3235 | writel(np->SavedClkRun, ioaddr + ClkRun); |
| 3236 | } |
| 3237 | } |
| 3238 | } |
| 3239 | netif_device_detach(dev); |
| 3240 | rtnl_unlock(); |
| 3241 | return 0; |
| 3242 | } |
| 3243 | |
| 3244 | |
| 3245 | static int natsemi_resume (struct pci_dev *pdev) |
| 3246 | { |
| 3247 | struct net_device *dev = pci_get_drvdata (pdev); |
| 3248 | struct netdev_private *np = netdev_priv(dev); |
| 3249 | |
| 3250 | rtnl_lock(); |
| 3251 | if (netif_device_present(dev)) |
| 3252 | goto out; |
| 3253 | if (netif_running(dev)) { |
| 3254 | BUG_ON(!np->hands_off); |
| 3255 | pci_enable_device(pdev); |
| 3256 | /* pci_power_on(pdev); */ |
| 3257 | |
| 3258 | natsemi_reset(dev); |
| 3259 | init_ring(dev); |
| 3260 | disable_irq(dev->irq); |
| 3261 | spin_lock_irq(&np->lock); |
| 3262 | np->hands_off = 0; |
| 3263 | init_registers(dev); |
| 3264 | netif_device_attach(dev); |
| 3265 | spin_unlock_irq(&np->lock); |
| 3266 | enable_irq(dev->irq); |
| 3267 | |
| 3268 | mod_timer(&np->timer, jiffies + 1*HZ); |
| 3269 | } |
| 3270 | netif_device_attach(dev); |
Mark Brown | b27a16b | 2006-02-02 00:00:01 +0000 | [diff] [blame] | 3271 | netif_poll_enable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | out: |
| 3273 | rtnl_unlock(); |
| 3274 | return 0; |
| 3275 | } |
| 3276 | |
| 3277 | #endif /* CONFIG_PM */ |
| 3278 | |
| 3279 | static struct pci_driver natsemi_driver = { |
| 3280 | .name = DRV_NAME, |
| 3281 | .id_table = natsemi_pci_tbl, |
| 3282 | .probe = natsemi_probe1, |
| 3283 | .remove = __devexit_p(natsemi_remove1), |
| 3284 | #ifdef CONFIG_PM |
| 3285 | .suspend = natsemi_suspend, |
| 3286 | .resume = natsemi_resume, |
| 3287 | #endif |
| 3288 | }; |
| 3289 | |
| 3290 | static int __init natsemi_init_mod (void) |
| 3291 | { |
| 3292 | /* when a module, this is printed whether or not devices are found in probe */ |
| 3293 | #ifdef MODULE |
| 3294 | printk(version); |
| 3295 | #endif |
| 3296 | |
Jeff Garzik | 2991762 | 2006-08-19 17:48:59 -0400 | [diff] [blame] | 3297 | return pci_register_driver(&natsemi_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3298 | } |
| 3299 | |
| 3300 | static void __exit natsemi_exit_mod (void) |
| 3301 | { |
| 3302 | pci_unregister_driver (&natsemi_driver); |
| 3303 | } |
| 3304 | |
| 3305 | module_init(natsemi_init_mod); |
| 3306 | module_exit(natsemi_exit_mod); |
| 3307 | |